A newsagent said heavy rain brought the worst flooding he has seen in the 17 years he has run his shop.
Video showed a torrent of water gushing down Station Road in Harpenden, Hertfordshire on Tuesday evening.
Nitan Shah said: “In all the 17 years, yesterday was the worst day. Four to five inches in the shop. It was completely out of the blue.”
It followed a Met Office yellow weather warning for thunderstorms covering the East of England.