Lightning has struck and injured a father and his two children in Northern Ireland, UTV understands.
The man and a five-year-old boy are fighting for their lives, while a seven-year-old girl was seriously injured during the incident at Lisburn in Co Antrim.
It comes as thunderstorms and heavy downpours fell across the UK this afternoon, causing flash flooding.
Three people were rescued after their cars were submerged in floodwater.
The cars sank on Manor Road in Wallington, near Croydon, after the area was hit with flash flooding.
The three vehicles sank to a depth of two metres along the same stretch of road.
Two people were helped by members of the public before the London Fire Brigade arrived and assisted the third driver.
Thousands of passengers have been delayed after flash flooding caused a power outage at Luton Airport.
Flash floods have left cars submerged and turned roads into rivers, with close to a month's worth of rain falling in one hour.