Yellow weather warning for thunderstorms expected this weekend across South Yorkshire
Thunderstorms are expected in South Yorkshire and North Derbyshire tomorrow (Saturday 21 June).
Last updated 20th Jun 2025
Thunderstorms are threatening to hit the whole of South Yorkshire and South Derbyshire on Saturday, following possible heatwaves around the country.
Temperatures could reach up to 34C in isolated areas of England, but rain, hail and lightning could be on their way, a Met Office spokesperson has said.
In South Yorkshire and North Derbyshire, the rain is expected to start late morning. Meanwhile, the yellow weather warning is in place from 3pm until 4am on Saturday.
The Met Office warned the most intense storms could produce "frequent lightning, large hail and gusty winds", along with a chance of flooding.
It comes as a number of areas around the country could reach heatwave thresholds on Friday.
Met Office spokeswoman Nicola Maxey said: "There are scattered thunderstorms coming through.
"Some of the rain could be quite intense, and frequent lightning, hail, gusty winds and some heavy downpours, which we haven't seen for a while.
"Some of the ground is quite hard at the moment, and when you get heavy rain hitting hard ground, it can cause surface water issues.
"You might find surface water on the roads, drains finding it difficult to cope and a small chance of homes being flooded."
The alert, issued by the UK Health Security Agency (UKHSA) for the first time since September 2023, is in force until 9am on Monday.
It warns "significant impacts are likely" across health and social care services because of high temperatures, including a rise in deaths, particularly among those aged 65 and over or people with health conditions.
Following the hot weather, the Royal Society for the Prevention of Accidents (RoSPA) has urged the public to take heat and water safety seriously.