A27 in both directions closed due to flooding between A259 Bognor Road (Bognor Bridge Roundabout, Chichester) and Meadow Way (Tangmere Roundabout).
Highways report the road is unlikely to be open before 1pm.
More top news
Tuesday evening's weather for the east of the region
Tuesday evening's weather for the west of the region
Highways England thanked people for pointing it out. The A34 sign has now been removed.