Brixham Coastguard says Force 12 winds have been reported by the Berry Head weather station on the Torbay coast.
The hurricane-force winds are gusting at 64 knots - that's more than 70 mph.
Hundreds of people had to be evacuated from homes in Barnstaple after the River Yeo burst its banks.
A woman spent 50 minutes clinging to a branch after being swept away from her flooded car at Umberleigh in North Devon.
Braunton's brand new flood defences were unable to withstand their first test of flooding.