There are delays of up to 20 minutes on the A303 in in both directions between A30 (Upottery) and A358 / B3168 Station Road (Southfields Roundabout, Ilminster).
The road is closed due to a serious accident. Two vehicles were involved.
Air ambulance attended the scene. One person was airlifted to Frenchay Hospital in Bristol. Police say the person is seriously injured.
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Only handful of beaches have RNLI lifeguard cover during school holidays - the Maritime and Coastguard Agency warns.
Our Devon correspondent Seth Conway has been talking to a family who say without the hospitals, their children may not have survived.
It's going to be a windy one tonight and into the weekend - it could even touch gale force along the south coast.