The government had ruled out expanding south-east England airports when it came to power in 2010.
The problem is made worse by the fact that south-east England is actually sinking slightly every year.
BBC: By BBC News Online Environment Correspondent Alex Kirby
Drought restrictions were already in place in south-east England, East Anglia, parts of the South and Yorkshire.
Severe snow warnings remain in place for east and south-east England, the East Midlands and Yorkshire and Humber.
The forecast for the weekend ahead in south-east England is for more dry weather in the Thames Valley.
That would mean lower salaries outside south-east England a move that should make it easier for private firms to compete for staff.
Parts of north-west Scotland saw about 110% of normal April rainfall, while parts of south-east England saw less than 10% of normal.
The figures suggested patients and visitors in London and south-east England paid the most, with the cheapest charges in the South West.
Areas in southern and South-East England were experiencing very low groundwater levels, prompting a number of water companies to impose hosepipe bans.
BBC: Met Office: 2012 was UK's second wettest year on record
The storms in the early hours of Tuesday followed a weather warning issued by the Met Office for parts of south-east England.
South-east England received just two-thirds of the long-term average rainfall for January.
BBC: South East latest part of England officially in drought
Developer HelioSlough Ltd said its plans followed government policies to transport goods by rail and the terminal was needed to serve south-east England.
BBC: St Albans council threatens legal action over rail depot
During a speech in London, Mr Clegg said the British economy needs "major rebalancing" to shift focus away from London and south-east England.
Senior Lecturer of Modern Languages at the University of Kent, Paul Coggle, described how Estuary English had now spread to most of South-East England.
"Unlike south-east England, Wales cannot afford to lose such jobs until we are in a position to develop large scale high-tech companies, " he said.
Politicians, farmers and water industry leaders will attend a "water summit" to look at supply issues after drought hit south-east England earlier this year.
One out of every three drivers in south-east England asked believed it, as did 39% of those in north-east England and Yorkshire and 30% in the Midlands.
The pair met at the Chichester Yacht Club in south-east England, embarking on a whirlwind romance that found them engaged just six months later.
The supergrass, who now lives in south-east England, was the only witness in a trial of 35 IRA and INLA suspects which collapsed in 1984.
People living in London and south-east England recorded the highest percentages of "very good" or "good" general health, and those in Wales and north-east England the lowest.
Peterborough is one of a select group of cities and towns in south-east England that are happily sprawling outward, like small versions of Fort Worth or Houston.
ECONOMIST: Some parts of England are not afraid of development
The Environment Agency said rain falling on already saturated ground is likely to lead to flooding this week, although a clear start to Monday was forecast for south-east England.
His speech talked up Scotland's relatively strong position within the UK, with income per head beaten only by London and south-east England, and employment higher than the UK average.
Developer HelioSlough Ltd said its plans followed government policies to transport goods by rail not road and that the terminal was needed to serve the whole of south-east England.
In south-east England, it's 74% of the workforce, north-east England is again worst off with 65%, while the UK average is 70%, and Scotland's again doing slightly better at 71%.
The plans, intended to regenerate the town, which is described as the most deprived district in south-east England, will have to be approved by the Deputy Prime Minister, John Prescott.
Wales and south-east England are also expected to see some snow during Monday, with the far south-west of England and Northern Ireland being the only regions untouched by the severe cold.
Should the sport move away from Europe, its creative heart would almost certainly stay in the crescent of south-east England where most race teams are clustered, and where Indy cars are also developed.
There's a huge demand for new housing, especially in south-east England, and if greenfield sites are to be avoided, the land available for development is often in the very areas most at risk from flooding.
There are 110, 000 hotel rooms in the Greater London area and a further 75, 000 in south-east England within easy travelling distance of London - the most that any Olympic city has ever been able to offer.
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