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
Your latest weather update with Bob Crampton.
Bristol Mayor George Ferguson has been accused of a "nasty personal attack" in a row over how the city's Green Capital cash was spent.
Bristol Mayor George Ferguson says there will be "further breakdown" of how the city's Green Capital cash was spent.