Amber thunderstorm warning
Warning: Torrential rain and thunderstorms could lead to some significant surface water flooding.
Flooding of homes and businesses is likely and could happen quickly.
Fast-flowing or deep floodwater is likely, causing danger to life.
Some communities are likely to be cut off if roads flood, with delays or cancellations to trains and buses.
Power cuts are likely to occur.
Where: London, and the South East and East of England
When: Until 11am
Yellow thunderstorm warning
Warning: Heavy rain and thunderstorms may lead to disruption, including road closures and delays or cancellations to trains and buses.
Flooding of homes and businesses could happen quickly and fast-flowing or deep floodwater is possible, causing a danger to life.
Power cuts may occur and some communities might become cut off if roads flood.
Where: South East, East, North East, North West and South West of England, East and West Midlands, London, and Yorkshire and Humber.
When: Until 9pm
Yellow rain warning
Warning: Heavy rain and isolated thunderstorms may cause some flooding.
A slight chance of power cuts and a small chance that homes and businesses could be flooded.
Delays or cancellations to train and bus services are likely in flooded areas.
Where: Central, Tayside and Fife, Grampian, Highland, South West Scotland, Lothian Borders, Strathclyde, Northumberland and Cumbria.
When: From 4pm until noon tomorrow
Yellow rain warning
Warning: Heavy rain and isolated thunderstorms may cause some localised flooding.
There is a slight chance of power cuts and a small chance that homes and businesses could be flooded.
Expect a slight chance of delays or cancellations to trains and buses, and that some communities will become cut off by flooded roads.
There is a small chance of fast-flowing or deep floodwater causing danger to life.
Where: South West of England
When: From noon tomorrow until 3am Monday