Why heavy rain might be dangerous after drought [video]

Heavy rain after a drought can cause flash floods because the hardened soil won't absorb the rain quickly (as illustrated in the video).

The video is from Dr Rob Thompson - a Meteorologist from the University of Reading in the UK. A tweet about the video here:

Rob Thompson: https://twitter.com/R0b1et/status/1557034641445486592

Dangerous? Because dangerous means we can avoid it.