A severe weather warning for heavy rain is in place in Wales, southern England, the Midlands, East Anglia and parts of Scotland.
Torrential rain and thunder forecast on Tuesday has triggered more than 200 flood alerts and warnings and prompted an evacuation notice in Norfolk.
Some regions are expected to receive the equivalent of two weeks of rain in less than an hour.
The Met Office has issued a severe yellow weather warning for heavy rain across Wales, southern England, the Midlands, East Anglia and parts of Scotland.


Forecasters warned there was a “small chance” that floods could cause damage to homes and businesses, power cuts and pose a “danger to life”.
Spray and flooding could make driving conditions difficult and some roads might be closed, the Met Office said.
“We could see some local quite torrential downpours and a risk of surface water flooding,” said meteorologist Luke Miall.
He added that slow-moving clouds on Tuesday meant “we could see as much as 40 to 50mm (1.57 to 1.97in) maybe in a couple of hours in some spots”.
Credit: Sky News