Flooding is expected in parts of Britain over the next 48 hours, with up to three inches of rain to fall in the worst affected areas.
Some areas in the east today were already experiencing localised flooding.
Travel problems and chaos for commuters is also expected – with many warned to take extra care with their journeys and to plan ahead.
While heavy rain already battered the capital today, more wet weather is expected across the country with Lincolnshire, South Yorkshire and the Humber forecast to be the worst hit.
Up to 2.76 inches (70 mm) of rainfall could fall in those places in just two days.
Flooding was already reported in East Anglia as well.
Flood alerts have been issued in the South East, Midlands and East Anglia due to surface water and low-lying rivers.
Areas where flood alerts are in place include High Wycombe, Newbury, Basingstoke, Bromley, Lewisham, Greenwich and Croydon.
Yellow alerts have been issued for Cambridgeshire, Lincolnshire, Norfolk, Peterborough, Suffolk, East Riding of Yorkshire, Kingston upon Hull, North Yorkshire and York.
The Environment Agency said: ‘There may be some flooding of low-lying land and roads, some disruption to travel and possibly flooding to individual properties.’
A Meteo Group forecaster added: ‘An area of prolonged rain is moving up over the eastern region and it’s not going to shift until Wednesday night.
‘The rain is not exclusive to the east region but that’s where the persistent and largest rainfall totals of between 50 and 70mm will be.
‘Pretty much the whole of Great Britain will see rain at some point over the next 48 hours.
‘This means there could be some localised flooding.’
27 May 2014 | 4:09 pm – Source: metro.co.uk