Thunderstorms and heavy rain are predicted across England and Wales on Tuesday, with warnings over flash flooding and disruption.
The Met Office has issued a yellow thunderstorm warning for most of the UK on Tuesday. Conditions could also cause transport disruption and power cuts in areas hit by heavy rain.
Hail, frequent lightning and flash flooding is possible, with the rain likely to become more concentrated in southern parts of England later.
Downpours are expected across Scotland on Tuesday but will gradually clear as the day goes on, while Northern Ireland will be the driest.
Tuesday’s predictions follow heavy rain and flooding in some parts of Devon and Cornwall on Monday afternoon as thunderstorms developed in east-coast counties such as Essex, Suffolk and Lincolnshire.
The wet weather comes after weeks of little rain and high temperatures that caused droughts across several parts of the country, as well as wildfires and triggered hosepipe bans.
Videos shared on social media showed a roundabout near a river in Truro, Cornwall, quickly flooding as showers moved in.
Despite expected thunderstorms, the Met Office said Monday marked the eighth day in a row with the temperature hitting 30C. Met Office meteorologist Greg Dewhurst said temperatures will be lower on Tuesday, with highs of around 27C.
Flood warnings as water drains off surface
As a result of the dry ground in recent weeks, experts have warned the likelihood of flooding is higher as surfaces act “a little bit like concrete” and water drains off instead of seeping through.
“There is the damage to homes and businesses these floods can cause, and inconvenience with transport disruptions, but if it is very heavy in one place it can also be very dangerous,” said Professor Hannah Cloke, an expert in hydrology at the University of Reading.
London mayor Sadiq Khan warned people in the capital on Monday to prepare for flash flooding this week amid heavy rain and thunderstorms.
Experts warned that city drainage systems may not be able to cope if a sudden downpour hits as water is likely to run off land that has dried up over weeks of little rain and hot weather.
Geographers and meteorologists say that the best type of rain to bring the earth out of its parched state would be a light drizzle.
Possible disruptions to travel
Mr Dewhurst warned that the bad weather conditions could pose difficulties for those hoping to travel and urged people to stay up to date with developments in their local area.
He said we will see some “very heavy showers develop over the coming days”.
The yellow weather warnings are also in place on Wednesday for southern England, where communities could be cut off by flooded roads, and the chance of fast-flowing or deep flood water could cause danger to life.
But as the week progresses, the weather is predicted to become breezier with some showery rain, particularly across the north of the UK.
Mr Dewhurt said temperatures will generally be around average for many, but could possibly be a bit above for the far south, in the mid-20s.
“It looks probably most likely from late Wednesday to Thursday onwards it will become fresher for everyone,” he added.