The Met Office says 2012 was the second wettest year across the UK in records dating back more than a century.
A family from Melksham on holiday in Gloucestershire over Christmas had to be rescued from their cottage after being marooned by the floods.
Tyntesfield Estate in North Somerset has been forced to close after the visitor centre was flooded.
RNLI volunteers are on stand by as the region braces itself for more rain. Winds of up to 70mph are also expected.