The Westcountry was told to expect yet another spell of heavy rain after forecasters issued a third weather warning in as many weeks.
The Met Office predicted torrential downpours would begin at around 9pm last night and continue into this morning, placing the region on yellow alert.
Around 15-25 mm of rain is expected to fall quite widely in a relatively short period of time, with some locations receiving as much as 60mm.
The deluge posed a risk of surface water flooding and spray on roads, the Met Office said.
"An area of warm, humid air is expected to spread from northern France into the English Channel and de-stabilise during Wednesday evening, with heavy, possibly thundery, rain forming into a northeastward moving band," it added.
Despite this, the Environment Agency did not issue any flood warnings and said the weather front should be blown over by strong winds.
Spokesman Mike Dunning said Mid Devon and Dorset could get as much as 60mm, but added that the belt of rain would "blow through quite quickly".
"There will probably be about an inch of rain on higher ground," he added.