Did London’s super-basements trigger flash floods

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Sprawling super-basements dug beneath London’s homes were today blamed for ‘biblical’ flash flooding that caused millions of pounds of damage to properties.

The enormous underground caverns – popular with the wealthy wanting to expand their space – were criticised by experts and victims of the massive leaks as they counted the cost of the weather today.

Kensington and Chiswick were been particularly hard hit as three inches of rain hit in the third wettest day for West London on record.

The waters cascaded into homes, ruining treasured possessions and mementos and causing expensive damage to properties. 

Flooding expert and campaigner Mary Dhonau OBE told MailOnline flooding was caused by a jigsaw of different factors.

But the consultant, who has previously been chair of the National Flood Forum, said the rise of the ‘super-basement’ would contribute as it took away land that would previously have absorbed water to avoid flooding.

She said: ‘There has got to be somewhere for the water to go. When there is rain it falls onto the ground and percolates in areas of the ground. Super-basements are being built where the water would naturally percolate.

‘There are other factors like climate change, but the more we take away permeable surfaces the more places will flood.

‘North Kensington is a prime example of land that would have soaked up water, which is now being used for super basements.

‘It is a jigsaw of things that can cause flooding. You can do things to make flooding more likely and one of those things is using more land for super-basements.’

Queen guitarist Brian May, who also lives in the area, said he was heartbroken and devastated after coming back to the ‘horror’ of finding his basement flooded with a sewage overflow which destroyed carpets, rugs and precious photos and memorabilia from over the years.

Brian, 73, who is married to former Eastenders actress Anita Dobson, 72, posted a video on his Instagram to show the extent of the ‘disgusting’ damage in their £7million home.

He admitted he didn’t ‘know where to start’ as he showed off the ‘stuff’ including ancient photos from his childhood strewn and dirtied everywhere at the bottom floor of their house.

He said: ‘Just when you think everything is ok, nothing else is going to bite you, you can deal with life’

‘It feels like we were have been invaded, desecrated. Anita had a lifetime of memorabilia on the floor of our basement – and most of it is sodden and ruined. I had rescued all my most treasured childhood photo albums and scrapbooks from my studio house because it was threatened with a forest fire some months ago.’

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‘Where did I put it all for safety ? In the basement here in Kensington. Irony. Today it turned into a sodden mess.’

‘Historically, for 150 years, Kensington has never flooded due to rainwater. Why did this happen ? It’s almost certainly the result of all the basement building that has been plaguing this area for the past 10 years.

‘The Royal Borough of Kensington and Chelsea council was warned years ago that sinking so many deep basement extensions would obstruct the aquifers underneath our living space and render the drainage system ineffective.’ 

In recent years researchers at Newcastle University found there were 785 large basements – going at least two storeys under the house, or one storey far under the garden, in the study carried out for The Guardian .

A further 112 were ‘mega basements’ – at three storeys in depth or two far under the garden. Some 67 are in Kensington and Chelsea, while another 34 are in Westminster. 

Jacqui Barber, 60, told MailOnline: ‘I was in the house and there was a lot of rain and it was torrential coming over the top’

Jacqui said her daughter had lost everything in the flooding and tens of thousands of pounds and was not insured

Jacqui said her daughter had lost everything in the flooding and tens of thousands of pounds and was not insured

Jacqui said her daughter had lost everything in the flooding and tens of thousands of pounds and was not insured

Queen guitarist Brian May had damage to his home

Queen guitarist Brian May had damage to his home

The Queen legend posted pictures of the damage

The Queen legend posted pictures of the damage

Queen guitarist Brian May posted pictures online of the flood damage which ruined treasured photographs and mementos

Mr May blamed deep basement extensions that have been built for causing problems with drainage of excess water

Mr May blamed deep basement extensions that have been built for causing problems with drainage of excess water

Mr May blamed deep basement extensions that have been built for causing problems with drainage of excess water

This home in Maida Vale and its glass door showed exactly how much water had fallen in the capital yesterday evening

This home in Maida Vale and its glass door showed exactly how much water had fallen in the capital yesterday evening

This home in Maida Vale and its glass door showed exactly how much water had fallen in the capital yesterday evening

Daisy King posted the devastating damage to her home as the water managed to get in and flood her property

Daisy King posted the devastating damage to her home as the water managed to get in and flood her property

Daisy King posted the devastating damage to her home as the water managed to get in and flood her property

The mess dragged in from the water could be clearly seen in the devastating pictures, which were posted publicly online

The mess dragged in from the water could be clearly seen in the devastating pictures, which were posted publicly online

The mess dragged in from the water could be clearly seen in the devastating pictures, which were posted publicly online

This London home saw the washing machine almost completely submerged by the flood water from the heavy rainfall

This London home saw the washing machine almost completely submerged by the flood water from the heavy rainfall

This London home saw the washing machine almost completely submerged by the flood water from the heavy rainfall

A motorist wades to safety after a freak flash flood submerged the road outside Westfield London on Monday evening

A motorist wades to safety after a freak flash flood submerged the road outside Westfield London on Monday evening

A motorist wades to safety after a freak flash flood submerged the road outside Westfield London on Monday evening

Storeholders around Portobello Road, West London start the clear up after torrential rain and flash flooding caused damage

Storeholders around Portobello Road, West London start the clear up after torrential rain and flash flooding caused damage

Storeholders around Portobello Road, West London start the clear up after torrential rain and flash flooding caused damage

The study by Newcastle University found 4,650 basement have been approved for homes in London in just a decade

The study by Newcastle University found 4,650 basement have been approved for homes in London in just a decade

The study by Newcastle University found 4,650 basement have been approved for homes in London in just a decade

The weather is set to clear as the week goes on with higher temperatures expected into the weekend

The weather is set to clear as the week goes on with higher temperatures expected into the weekend

The weather is set to clear as the week goes on with higher temperatures expected into the weekend

A Kensington and Chelsea Council spokesperson said: ‘Our priority is to make sure residents who have been affected by last night’s flooding have the help they need.

Overnight we have placed 120 residents in emergency hotel accommodation and are making emergency repairs this morning. We are making welfare calls to vulnerable residents and have set up a centre at The Curve in North Kensington where Council officers are on hand to support people affected. Flash floods have affected boroughs across London after sudden and torrential rainfall.

This is causing damage and disruption across the city, not just here in Kensington and Chelsea and is not linked to basement building.’ 

Network Rail has confirmed widespread disruption continues across the Thameslink network despite services resuming within the last hour while Tube services on the Circle, District and Hammersmith & City lines remain partially suspended due to the flooding.

The London Overground also remains partly suspended with severe delays across the network while teams work to repair the damage caused.

Last night, flood waters poured through the streets of Portobello Road in Notting Hill after nearly three inches of rain hit the capital in just 90 minutes and in Raynes Park, south London, cars were left abandoned in around 2ft of water after torrential downpours caused travel chaos and left homes and businesses flooded.

Meanwhile in Turnpike Lane, north London, people were spotted wading through the water in the streets as the heavy rain pelted down and flooded the roads. 

Writer Liz Brewer, who has penned two books on etiquette, was hit by floods of dark water in her home in Belgravia.

She told MailOnline: ‘There were about 12 inches of water that hit my home. Fortunately I was out when it happened and I got the alert something was wrong.

‘It is the basement of my house, which is where my office is located, so a lot of my files down there have been ruined. Fortunately I have a back up of most things on my computer.

‘I am ringing the insurers this morning. My neighbours also had about the same amount of water come in. It was dark water, it’s never happened before. I’m sure there is a lot of damage in the area, fortunately it seems to be mostly in basements.’  

Jacqui Barber, 60, told MailOnline: ‘I was in the house and there was a lot of rain and it was torrential coming over the top of the houses.

‘I heard a gurgling sound and water started coming up in the toilet. I flushed it and it went down again but the next thing we knew it was pouring through the front door and was up to our knees.

‘It went up to our knees in sewage water, nothing could be saved. We have lost tens of thousands of pounds and we are not insured.

‘We have managed to get a lot of the stuff out and it’s now all at the front of the property. It was my daughter’s flat in the basement and I live above so she is coming up with me. She is nine months pregnant. 

‘People are out in the streets today just dragging their belongings out. One of my neighbours is insured but they are told me they’ve been told it isn’t covered because it’s classed as a national disaster.’

In other scenes, Sloane Square tube station in Chelsea was forced to shut down after fast flowing water poured down the steps of the underground and in South Hampstead motorists desperately tried to navigate their way through the roads as the heavy rainfall continued to fall. 

Elsewhere, in St John’s Wood, one homeowner was left shocked as water began to splurge out of their overflowing toilet through their property.  

MPS Westminster also reported heavy flooding around Colville Terrace, Holland Road and Ladbroke Grove and said the emergency services were now evacuating areas due to flooded properties and collapsed ceilings.   

Cars are left abandoned in around 2ft of water after heavy rain falls on a road in South Hampstead, north London, yesterday

Cars are left abandoned in around 2ft of water after heavy rain falls on a road in South Hampstead, north London, yesterday

Cars are left abandoned in around 2ft of water after heavy rain falls on a road in South Hampstead, north London, yesterday

Flood waters poured through the streets of Portobello Road in Notting Hill after nearly three inches of rain hit the capital in just 90 minutes yesterday

Flood waters poured through the streets of Portobello Road in Notting Hill after nearly three inches of rain hit the capital in just 90 minutes yesterday

Flood waters poured through the streets of Portobello Road in Notting Hill after nearly three inches of rain hit the capital in just 90 minutes yesterday

Rain batters the streets of London forcing cars to drive through inches of rain during thunderstorms in London last night

Rain batters the streets of London forcing cars to drive through inches of rain during thunderstorms in London last night

Rain batters the streets of London forcing cars to drive through inches of rain during thunderstorms in London last night

It wasn't all mayhem, as mechanic Andy Simmons downed tools and brought out the jet-ski he stores at his garage in Poole, Dorset

It wasn't all mayhem, as mechanic Andy Simmons downed tools and brought out the jet-ski he stores at his garage in Poole, Dorset

It wasn’t all mayhem, as mechanic Andy Simmons downed tools and brought out the jet-ski he stores at his garage in Poole, Dorset

Cars are abandoned in water after torrential downpours left roads flooded in Turnpike Lane, north London, yesterday

Cars are abandoned in water after torrential downpours left roads flooded in Turnpike Lane, north London, yesterday

Cars are abandoned in water after torrential downpours left roads flooded in Turnpike Lane, north London, yesterday

In St John's Wood, one homeowner was left shocked as water began to splurge out of their overflowing toilet through their property

In St John's Wood, one homeowner was left shocked as water began to splurge out of their overflowing toilet through their property

In St John’s Wood, one homeowner was left shocked as water began to splurge out of their overflowing toilet through their property

Roads are flooded in Maida Vale, west London, after heavy rainfall hits the capital - with nearly three inches of rain hitting the region in just 90 minutes

Roads are flooded in Maida Vale, west London, after heavy rainfall hits the capital - with nearly three inches of rain hitting the region in just 90 minutes

Roads are flooded in Maida Vale, west London, after heavy rainfall hits the capital – with nearly three inches of rain hitting the region in just 90 minutes

People sprint through the streets of Highgate in north London with their umbrellas to get out of the torrential downpours

People sprint through the streets of Highgate in north London with their umbrellas to get out of the torrential downpours

People sprint through the streets of Highgate in north London with their umbrellas to get out of the torrential downpours 

People are left drenched as torrential rain falls down on Turnpike Lane in north London, with the Met Office warning of floods and up to two inches of rain

People are left drenched as torrential rain falls down on Turnpike Lane in north London, with the Met Office warning of floods and up to two inches of rain

People are left drenched as torrential rain falls down on Turnpike Lane in north London, with the Met Office warning of floods and up to two inches of rain

The London Fire Brigade received more than 1,000 calls last night and the Met Office also warned there would be flooding in the south of the country

The London Fire Brigade received more than 1,000 calls last night and the Met Office also warned there would be flooding in the south of the country

The London Fire Brigade received more than 1,000 calls last night and the Met Office also warned there would be flooding in the south of the country

Pipes begins to overflow on a road in Lancaster West Estate, near Grenfell, west London, after heavy rainfall hits the region

Pipes begins to overflow on a road in Lancaster West Estate, near Grenfell, west London, after heavy rainfall hits the region

Pipes begins to overflow on a road in Lancaster West Estate, near Grenfell, west London, after heavy rainfall hits the region

A bridge is roped off after a road was flooded in south London, as heavy rain continues to fall across London and the south of England

A bridge is roped off after a road was flooded in south London, as heavy rain continues to fall across London and the south of England

A bridge is roped off after a road was flooded in south London, as heavy rain continues to fall across London and the south of England

The Met Office issue a yellow weather warning as west London is battered with downpours of rain and thunderstorms

The Met Office issue a yellow weather warning as west London is battered with downpours of rain and thunderstorms

The Met Office issue a yellow weather warning as west London is battered with downpours of rain and thunderstorms

 A spokesman said: ‘Reports of heavy flooding around Westminster including Colville Terrace, Holland Road and Ladbroke Grove Emergency services assisting in evacuating areas due to reports of flooded properties and collapsed ceilings. Road closures are in place. 

It came as the Met Office issued a yellow weather warning for rain for a large section of southern England and the Environment Agency issued one flood alert for areas close to the upper River Loddon in Basingstoke, Hampshire. 

As the intense downpours ensued, the London Fire Brigade confirmed they had received more than 1,000 calls related to flooding and urged people to ‘only call if there was a genuine emergency’.

A spokesperson for the service said: ‘We’re asking people not to walk through or drive through the flood water. Flood water can be contaminated and vehicles can become unstable.

‘We’re also asking people to look out for their neighbours and look out for weather warnings in their area.’   

Yesterday, Euston Station lines had to be shut down and underground stations, including Chalk Farm and Hampstead stations in north London and Wimbledon in the south, also drew their barriers due to the heavy rainfall. 

A Network Rail spokesperson said: ‘The line between Watford Junction and Euston has been closed and engineers are on site inspecting the track as the water recedes. As soon as it is safe to do so, we will have trains on the move again. 

‘We would advise anyone travelling this evening to check with their train operator or the National Rail Enquiries website for the latest information.’ 

The flooding problems appear to be concentrated in south west and north west London, including boroughs such as Richmond and Kingston.

Last night, residents in a number of areas such as South Hampstead, West Hampstead, Raynes Park, Friern Barnet, Isleworth and Wimbledon took to social media to post videos of the scenes as they expressed their shock at finding whole roads in their neighbourhoods submerged underwater.

Pictures also emerged of people swimming in ponds created by the thunderstorms on Primrose Hill.

In South End Green, firefighters were called to help carry some walkers to safety across roads that had been flooded by water pouring off Hampstead Heath.

And tenants of Lancaster West Estate in North Kensington, near Grenfell Tower, complained that a storm had caused a nearby manhole cover to blow off and ‘water and raw sewage’ was now flowing around the block. 

Elsewhere in the UK, Preston was also affected by flooding, with a section of the M6 having to be closed to traffic for some time on Monday afternoon. It has since reopened. 

Yesterday, the Met Office issued a severe rain alert for London after parts of the UK were hit by heavy showers and  thunderstorms.

A Met Office spokesperson told Mail Online: ‘The torrential downpours could see 20 to 30mm of rain in an hour. Maybe 60mm over two to three hours. Today there is quite a lot of rain around, while tomorrow it becomes a lot more showery.’ 

The experts issued a yellow weather warning for large swathes of the south coast, with the possibility of flooding to homes, roads and businesses amid the torrential downpours. 

A flood warning was also put in place on the River Loddon where river levels have risen as a result of persistent rainfall in previous weeks. 

Drivers were told to beware of difficult driving conditions and some road closures due to the heavy rain, while warnings of possible travel disruption across train and bus services were also issued.  

The Met Office spokesperson added: ‘The yellow warnings covers most of the south coast from Kent down to Devon and up into East Anglia. 

‘Within that warning area you are at risk of seeing some slow moving heavy showers. There is a chance of some thunderstorms as well. The warning is in place until midnight tonight.’

But other parts of the UK are also set to be damp, even those not covered by the Met Office’s official warning.  

‘Warnings are issued on impact so the warning area is where we are expecting to see the impacts from the rain, but there could still be rain outside those areas,’ said the Met Office spokesperson. 

‘There’s heavy showers with the potential for thunderstorms in Northern Ireland and western Scotland as well. It’s just that the rain won’t have as much of an impact as some of those areas aren’t so heavily populated or built.’      

Torrential rain is starting to flood roads in London as lightning and thunder strike

Torrential rain is starting to flood roads in London as lightning and thunder strike

A woman walks in ankle-high rain during the storms this evening

A woman walks in ankle-high rain during the storms this evening

Torrential rain began to flood roads the roads in London yesterday as lightning and thunder also hit the capital

 

Londoners took to Twitter with their disbelief of the torrential downpours this evening

Londoners took to Twitter with their disbelief of the torrential downpours this evening

Londoners took to Twitter with their disbelief of the torrential downpours this evening

Social media users took to Twitter to share footage of roads covered in waters and cars left abandoned on the streets

Social media users took to Twitter to share footage of roads covered in waters and cars left abandoned on the streets

Social media users took to Twitter to share footage of roads covered in waters and cars left abandoned on the streets

A man gets absolutely soaked as he runs through the streets in Highgate, north London, as rain continued to pour down on the capital

A man gets absolutely soaked as he runs through the streets in Highgate, north London, as rain continued to pour down on the capital

A man gets absolutely soaked as he runs through the streets in Highgate, north London, as rain continued to pour down on the capital 

Flash flooding in Putney causes chaos on the roads while commuters try and get home in rush hour

Flash flooding in Putney causes chaos on the roads while commuters try and get home in rush hour

Flash flooding in Putney causes chaos on the roads while commuters try and get home in rush hour 

Heavy rainfall causes  chaos on the roads in Putney, southwest London, as flash flood hits the capital and southern parts of England

Heavy rainfall causes  chaos on the roads in Putney, southwest London, as flash flood hits the capital and southern parts of England

Heavy rainfall causes  chaos on the roads in Putney, southwest London, as flash flood hits the capital and southern parts of England

A cyclist is absolutely drenched as she cycles through Putney, southwest London, during last night's torrential downpours

A cyclist is absolutely drenched as she cycles through Putney, southwest London, during last night's torrential downpours

A cyclist is absolutely drenched as she cycles through Putney, southwest London, during last night’s torrential downpours

Flooding inside a building yesterday during the torrential downpours in the south of the country

Flooding inside a building yesterday during the torrential downpours in the south of the country

Flooding inside a building yesterday during the torrential downpours in the south of the country 

The umbrellas were necessary as the heavy rain set in across parts of the UK. Pictured: Group in Weymouth, Dorset

The umbrellas were necessary as the heavy rain set in across parts of the UK. Pictured: Group in Weymouth, Dorset

The umbrellas were necessary as the heavy rain set in across parts of the UK. Pictured: Group in Weymouth, Dorset

Met Office forecasters issued a yellow weather warning for the majority of the south coast amid concerns of flooding

Met Office forecasters issued a yellow weather warning for the majority of the south coast amid concerns of flooding

Met Office forecasters issued a yellow weather warning for the majority of the south coast amid concerns of flooding

Crestfallen football fans joked that the bleak weather is reflecting the mood of the nation after England lost to Italy in the Euros 2020 final last night

Crestfallen football fans joked that the bleak weather is reflecting the mood of the nation after England lost to Italy in the Euros 2020 final last night

Crestfallen football fans joked that the bleak weather is reflecting the mood of the nation after England lost to Italy in the Euros 2020 final last night

Drivers were told to beware of difficult driving conditions and some road closures due to the heavy rain, while warnings of possible travel disruption across train and bus services were also issued. Pictured: Rainy Weymouth in Dorset

Drivers were told to beware of difficult driving conditions and some road closures due to the heavy rain, while warnings of possible travel disruption across train and bus services were also issued. Pictured: Rainy Weymouth in Dorset

Drivers were told to beware of difficult driving conditions and some road closures due to the heavy rain, while warnings of possible travel disruption across train and bus services were also issued. Pictured: Rainy Weymouth in Dorset

Met Office weather warning map

Met Office weather warning map

Pictured: Pair sit on Eastbourne beach, East Sussex

Pictured: Pair sit on Eastbourne beach, East Sussex

But despite the gloomy weather, the showers are set to stop and the temperatures pick up as Britain heads into the weekend. Pictured: (Right) Pair sit on Eastbourne beach, East Sussex. (Left) Met Office weather warning map

A woman in an umbrella surveys the flooding caused by heavy rain in Bournemouth Gardens on the south coast of the UK

A woman in an umbrella surveys the flooding caused by heavy rain in Bournemouth Gardens on the south coast of the UK

A woman in an umbrella surveys the flooding caused by heavy rain in Bournemouth Gardens on the south coast of the UK

Bournemouth (pictured, flooding in Bournemouth gardens) is one of the many cities along the south coast affected by the yellow weather warnings

Bournemouth (pictured, flooding in Bournemouth gardens) is one of the many cities along the south coast affected by the yellow weather warnings

Bournemouth (pictured, flooding in Bournemouth gardens) is one of the many cities along the south coast affected by the yellow weather warnings

It follows news that despite the wet weather we experienced in Britain throughout the month, Europe enjoyed the second-warmest June on record.

But the good weather is set to return this weekend as the rain clears throughout the week with temperatures expected to reach up to 26C. 

This is due to a high pressure system building northeastwards from the Azores, which experts say mean the second half of the week will be warm and more settled. 

And in brighter news, the Met Office’s long range forecast is predicting sunnier spells for the rest of July and into early August, where conditions could be ‘warmer and drier’ than the average year. 

The Met Office spokesperson added: ‘From Wednesday we start to see a change and a shift in weather type and it becomes much more settled. 

‘We’re looking at some dry sunny weather, and as we go through the second half of the week temperatures will start to pick up a bit and become warmer day on day. 

‘There’s still potentially some cloud more on the east coast because the onshore breeze is bringing the cloud in. 

‘Those settled conditions are set to continue for the rest of the month into the start of August.

‘By the end of the week we could well see mid 20s quite easily. It looks like the warm weather will continue into the weekend and we could see mid to high 20s by the end of the weekend. 

‘The warm weather is being caused by a high pressure system and we could see 26, or up to 28 over the weekend.’

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