The A379 Teignmouth Road near Halcombe is closed in both directions at Forden's Lane due to an accident.
The road may remain closed throughout the morning rush hour period.
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The closure will mean all pupils will have to find an alternative school in September to carry on their studies.
The RSPCA is working on a prevention message to help resolve the increase of abuse of horses and donkeys within the west country.
Outbreaks of rain and drizzle could turn heavy at times, with foggy conditions persisting over main coastal areas. Highs of 13 or 14 C