Mid and West Wales Fire Service said about 60 properties in Solva were threatened by a burst river.
BBC: Wales weather: Flooding hits west, snow in the north
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County councillor Lyn Jenkins in Solva said she had driven back from Fishguard in the worst conditions on the road she had seen in 43 years.
BBC: Wales weather: Flooding hits west, snow in the north
3.
Station manager Craig Thomas was one of about 25 firefighters dealing with flooding problems after heavy rain arrived, and he was called to Solva about 21:00 GMT.
BBC: Wales weather: Flooding hits west, snow in the north