Britain is basking in sunshine today, with Sunday set to be the hottest day of the year so far - but the Met Office has warned the good news may be short lived.
Despite hot weather of up to 27C today, meteorologists are warning of heavy thunderstorms across the country.
Yellow weather warnings are in place for the west of Britain, including the majority of Wales, Scotland and Northern Ireland.
People in areas with a yellow warning should expect some disruption, especially to travel.
Yellow weather warnings are in place for the west of Britain, including the majority of Wales, Scotland and Northern IrelandMET OFFICESpray and sudden flooding could lead to difficult driving conditions and there is a slight chance of power cuts.
Met Office warning stated that "heavy showers and thunderstorms could lead to some disruption in places, especially to travel," adding that: "isolated property flooding is possible".
"Some intense downpours are possible in a few places, giving up to 30mm in less than hour and perhaps 50mm over 2 to 3 hours leading to surface water flooding," it continued.
"Large hail, frequent lightning strikes and possibly strong wind gusts will be additional localised hazards."
Winds will pick up as the thunderstorms sweep in a week of miserable conditions
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The national weather service said that the heavy rain meant "fast flowing or deep floodwater is possible, causing a danger to life".
The yellow weather warning remains in place for the west flank of England until 11pm tonight.
Scotland's yellow weather warning ends at 3am tomorrow morning.
Meanwhile, Northern Ireland had been told to remain on alert until 6am on Tuesday.
On Saturday, temperatures peaked at 25.9C in Herstmonceux, East Sussex, and in northern Scotland a temperature of 25.7C was recorded in Cassley.
Temperatures climbed steadily over the week, with the previous record set on Thursday, with a peak of 24.6C in London’s St James’s Park.
Although the weather for next week is set to see a return of cloud and rain, the warm weather will remain.
Temperatures are due to remain in the low 20s throughout the week. The sunshine is set to return later in the month when a second African Plume brings in hotter temperatures and sunshine.