The Met Office has issued a new yellow warning for thunderstorms after days of hot temperatures across the country.
Forecasters have warned that torrential downpours may bring disruption to parts of England and Wales tomorrow - but there is a risk of thunderstorms all around the UK.
Heavy rain will be slow-moving and intense, leading to large accumulations of water, in excess of 30mm in an hour for some locations.
There is also a potential for 60-80mm or more in a few hours due to thunderstorms. The Met Office has also warned of the risk of frequent lightning and hail which could be additional hazards.
Due to heavy rain, flooding of homes and businesses could happen quickly, and some buildings could be damaged by floodwater, lightning strikes, hail or strong winds.
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There is also a risk of difficult driving conditions, with spray and sudden flooding potentially leading to some road closures.
Flooding or lightning could also cause delays and cancellations to train and bus services, while some communities may become cut off if roads are flooded.
The yellow weather warning is in force from 12pm until 9pm on Monday, June 12.
It comes after days of hot temperatures, with the mercury reaching 32.2C on Saturday - and expected to be similar on Sunday.
Most of the UK will meet heatwave criteria next week, the Met Office said.
The UK Health Security Agency (UKHSA) has issued an amber alert for hot weather until 9am on Tuesday in the West Midlands, East Midlands, east of England, South East and South West.
It means the impact of the heat is "likely to be felt across the whole health service... and the wider population, not just the most vulnerable".
The Met Office had been expecting up to 100mm of rain on Saturday evening - the equivalent to a month's worth of rain - but the most recorded was 21.8mm in Billinge Hill, Merseyside.
Amy Bokota, senior operational meteorologist, said the lower recording could have been due to where the gauges fell, and said areas in the North West would still have seen torrential rain and hail, while in other areas not too far away there were mostly clear skies.
In Worcestershire, a road had to be closed after a tree came down and brought a power line with it.
West Mercia Operations and Communications Centre tweeted saying the A4133 Holt Fleet was closed on Saturday evening after the tree fell following heavy rain.
Police officers urged residents to avoid the area for their own safety.
And the Charlotte Edwards Cup final between Southern Vipers and the Blaze was suspended on Saturday evening following heavy rain in Worcester, with play set to resume at New Road on Sunday's reserve day.
A yellow warning for thunder is in place for Sunday from midday to 9pm for Wales, Northern Ireland and most of western and central England and Scotland.
Another warning for heavy rain has been issued for southwest and southeastern England as well as Wales from 7pm on Sunday until 9am on Monday.
Full list regions and local authorities affected by Monday's yellow warning
East Midlands
- Derby
- Derbyshire
- Leicester
- Leicestershire
- Northamptonshire
- Nottingham
- Nottinghamshire
- Rutland
East of England
- Bedford
- Cambridgeshire
- Central Bedfordshire
- Hertfordshire
- Luton
- Peterborough
London & South East England
- Bracknell Forest
- Buckinghamshire
- Greater London
- Milton Keynes
- Oxfordshire
- Reading
- Slough
- Surrey
- West Berkshire
- Windsor and Maidenhead
- Wokingham
North West England
- Cheshire East
- Cheshire West and Chester
- Greater Manchester
- Halton
- Merseyside
- Warrington
South West England
- Bath and North East Somerset
- Bristol
- Gloucestershire
- North Somerset
- South Gloucestershire
- Swindon
- Wiltshire
Wales
- Blaenau Gwent
- Bridgend
- Caerphilly
- Cardiff
- Carmarthenshire
- Ceredigion
- Conwy
- Denbighshire
- Flintshire
- Gwynedd
- Merthyr Tydfil
- Monmouthshire
- Neath Port Talbot
- Newport
- Pembrokeshire
- Powys
- Rhondda Cynon Taf
- Swansea
- Torfaen
- Vale of Glamorgan
- Wrexham
West Midlands
- Herefordshire
- Shropshire
- Staffordshire
- Stoke-on-Trent
- Telford and Wrekin
- Warwickshire
- West Midlands Conurbation
- Worcestershire