flash flood 
noun
A sudden local flood, typically due to heavy rain.Some supercells produce little rain, others, downpours that can cause flash floods....
- Heavy rain and flash floods on Monday brought misery to thousands across Britain, but yesterday it seemed the worst was over for Yorkshire for the time being.
- Long dry periods are often broken by heavy rains and flash floods.
- schooled
- school eleven
- schooler
- school feast
- school fee
- schoolfellow
- school fellowship
- school fete
- school fish
- school French
- schoolful
- schoolgirl
- schoolgirl complexion
- schoolgirl crush
- schoolgirl English
- schoolgirl French
- schoolgirlhood
- schoolgirlish
- schoolgirlism
- schoolgirl passion
- schoolgirl tone
- schoolgirly
- schoolgoer
- schoolgoing
- school hall