plague

plague
[Collins]If you are plagued by unpleasant things, they continually cause you a lot of trouble or suffering.

[quote]Weather forecasts predict heavy rain will continue to plague England
[quote]the capital has been plagued with flooding in parts of the city over the past week

Flash floods. It's a flood caused by a heavy downpour.

Flash floods: What to do in flash floods as heavy rain predicted for England
https://www.standard.co.uk/news/uk/flash-floods-heavy-rain-predicted-england-b1183782.html

<words>
give way to [quote] In London, the rain is giving way to showers
[Collins]If one thing gives way to another, the first thing is replaced by the second.
awash
spiral (verb) [quote]flash floods can rapidly spiral from a nuisance into life-threatening danger.
[Collins] If an amount or level spirals, it rises quickly and at an increasing rate.