Flash flooding typically lasts between a few hours and a day with very little warning. Among the causes are meteorological conditions to the ground situation, and they can be extremely costly and disruptive for local inhabitants. We found a great blog article that explains more.
Live Flood Update
Severe Flood Warnings
BBC News - Builders 'behind UK flooding risk' bbc.co.uk/news/science-e… Shortcomings not just on SUDS but also on property flood resilience