More than 380 people per day are at risk of eviction or repossession according to new figures from Shelter.
The charity is warning high housing costs are leaving families on the brink with little or no savings to fall back on.
Over 60,000 children in the capital are facing Christmas homeless this year, according to a new report from the charity Shelter.
The charity has found that the number of families living in B&B's and in shared housing has almost doubled in the past three years.
More than half of those families also say their children's mental and emotional health has been affected by their living situation.
Some children are facing a commute of up to two hours to get to school because of their living arrangements.
There are warnings that London needs to build its way out of a housing crisis.
"Centrepoint", the charity for homeless people, says that the capital is facing a dire shortage of homes with rent at below market rates.
It claims the soultion is build 185,000 more properties over the next eight years.
Ria Chatterjee has this report.
Roger Harding from Shelter says "It's truly shocking how many people are living with the threat of becoming homeless''
Homeowners in London face the highest risk of repossession in the country. A report by housing charity Shelter found repossession rates to be twice as high as the national average, and three times as high in Barking & Dagenham.
Over 57,000 children are set to wake up homeless in London on Christmas Day.
The charity Shelter says thousands of families are living in B&Bs or other temporary accommodation and the situation is getting worse.
Sharon Thomas has more.
Campbell Robb, Shelter's Chief Executive, is very worried about homeless families, especially at Christmas.
More than 57,000 children in London will wake up homeless on Christmas Day, housing and homelessness charity Shelter has warned today, enough to fill 254 primary schools in the region.
Shelter is highlighting the figures to launch its new campaign to raise awareness of the plight of homeless families in the area this Christmas, whose numbers have increased steadily over recent months.
Seventeen of the 29 London boroughs that supplied data will each have more than 1000 homeless children living in temporary accommodation.
Of particular concern is the increase in families forced to live in B&Bs in London, which has almost doubled in the last year.