Britain will be soaked by heavy thundery rain over weekend - just days after a record-breaking heatwave.
Temperatures plunged to about 20C as the hot weather came to an end - but unlucky travellers were suffering chaos across the UK.
Now yellow warnings for heavy rainfall cover most of the south-western Scotland and the UK.
They affect London will be in place until Sunday afternoon.
The cloudy and soggy weather conditions felt humid but have turned to heavy, thundery rain in overnight.
Forecasters say heavy rainfall could bring flooding, travel disruption and a slight chance of power cuts with bursts of 20-30mm - which could go up to 100mm in rural areas.
It means it could bring further travel disruption with the likes East Midlands Trains announced its repair work on damaged overhead line equipment.
The Met Office also said massive thunderstorms could strike the UK with 'frequent lightning, hail and gusty winds'.
Met Office meteorologist Marco Patagna said: "We have a rainfall warning out until tomorrow morning for southeast Scotland.
"As you get into tomorrow most of parts of the UK are cloudy with outbreaks of rain.
"And there is another yellow rainfall warning from 9am until Sunday at 3am for Northern Ireland, south Scotland and the north and east of England."
He added that the rain shifts towards the east over the day and on Sunday, the mercury remains at around the high teens and low 20s.
"Generally temperatures are closer to average than they have been recently," he added.
Today:
Southern and western Scotland, along with northern, central and southeastern parts of England will be rather cloudy with outbreaks of rain, some heavy and thundery. Elsewhere it will be mostly dry with some reasonably warm sunshine.
Tonight:
Overnight, rain is likely to continue affecting southwest Scotland, parts of northern and central England, along with East Anglia, edging slowly into Northern Ireland too. Dry elsewhere with clear spells.
Sunday:
On Sunday rain is most likely across Northern Ireland, southwest Scotland, some northern, central and southeastern parts of England. Elsewhere, sunshine and isolated showers. Coastal fog possible in the northeast.
Outlook for Monday to Wednesday:
Monday brings sunny spells, with showers in the north, and later southwest. Showery rain England and Wales on Tuesday, some thundery. Otherwise sunshine and scattered showers on Tuesday and Wednesday.
