Health experts have warned homeowners to take measures to stop "huge numbers" of rats flushed out by floods from re-establishing themselves.
The Chartered Institute of Environmental Health (CIEH) said people clearing up after the heavy rain should block up holes and clear up waste food.
Rats washed out of sewers are infesting homes amid more daytime sightings.
The pest-control industry estimates the number of call-outs to rat-catchers in flood-hit areas is up by a quarter.
CIEH director Julie Barratt said: "We know huge numbers have been washed out... where sewers have flooded, and there have been a lot of rat casualties.
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BBC.co.ukDid you know:
Brown rats are expert jumpers, climbers and swimmers and a single pair can multiply to 200 within a year.
