Frost Hill in Yatton is closed in both directions due to flooding between Mendip Road (Yatton) and A370 Bristol Road (Congresbury). Near the Cadbury Garden Centre.
There is also flood water along the diversion route - Claverham Road.
More top news
The fight for 10 Downing Street kicks off today with the dissolution of Parliament - and the South West is a key battleground for votes.
The Liberal Democrats won the Bath constituency in 2010. With the current MP standing down, the Conservatives are targeting this seat.
Bridgwater and West Somerset is considered a Conservative safe seat - in 2010 they had a majority of over 9,000 votes.