Thunderstorms will continue to hit the UK as the scorching weather brings with it the risk of flooding, travel disruption and power cuts.
There is a risk of flash flooding and sudden poor visibility amid the combination of heavy rain and balmy temperatures.
The Met Office has issued a yellow alert warning of thundery rain or showers which could bring local flooding to parts of southern England and Wales through Tuesday and into Wednesday morning.
Forecasters say there is a small chance that homes and businesses could be flooded or struck by lightning, causing damage to some buildings, and where flooding does occur there is a slight chance of delays or cancellations to train and bus services.
Spray and flooding could lead to difficult driving conditions and some road closures, while flooding or lightning strikes could cause power cuts in some areas.
A Met Office spokeswoman said: “It’s fairly normal weather for us to see thunderstorms through the summer months as temperatures warm up. Thunderstorms are caused by the warmer air.”
She said most summer rain comes in short, sharp, heavy showers, adding that what is unusual is the longevity of this period – with the risk of thundery showers lasting through the week.
While some places will escape the worst of the rain, or even manage to stay largely dry, some rain will be heavy and up to 1.2in (30mm) could fall in an hour or less and 1.6in-2in (40mm-50mm) could fall in a couple of hours.
More than 30 flood alerts are in place for England on Tuesday.
One elderly man lost his life in the early hours of Monday when his vehicle became submerged in Walsall, and multiple rescues had to be carried out from cars, buses and homes on Sunday, the West Midlands Fire and Rescue Service technical rescue unit said.
Cavendish in Suffolk was the warmest recorded spot on Monday, peaking at 27.3C a few degrees shy of the April high of 29.1C in central London.
Scotland, Wales and Northern Ireland all enjoyed their hottest days of 2018 on Monday, with Dunstaffnage in Argyll reaching 27.1C Hawarden Airport in Clwyd reaching 24.9C and Castlederg in County Tyrone reaching 25.1C