Yellow thunderstorm warnings issued across UK as flash flooding expected after weeks of drought

The Met Office has issued yellow thunderstorm warnings across parts of the UK, with heavy rain and flash flooding expected as the country emerges from an extended drought.

Warnings are in place for Northern Ireland from 12:00 to 23:59 BST on Wednesday, parts of north-east Scotland including Aberdeen from 14:00 to 21:00, and parts of northern England including Manchester and Newcastle from 19:00 Wednesday until 10:00 Thursday.

The Met Office warned of lightning, hail and thunder, with up to 30mm of rain possible within a few hours across north-east Scotland and Northern Ireland, and up to 50mm in six hours across northern England.

Flash flooding is a particular concern because prolonged dry weather has left the ground hard and compacted, making it more water-repellent and increasing surface run-off. Officials warned that homes and businesses could flood, transport services could be disrupted and power cuts are likely.

The rain arrives after almost two months of dry weather. Summer 2026 is on course to be the hottest on record in the UK, with five heatwaves recorded so far. Drought has been declared across 71.3% of England, while parts of eastern Scotland are experiencing significant water scarcity.

The Environment Agency cautioned that while the rainfall is welcome, sustained and significant rainfall will be needed to alleviate drought conditions. Much of the rest of the UK will see a mixture of sunshine and showers on Wednesday.