Three fire crews are fighting a blaze which broke out in the kitchen of a temporary building in Walton.
The building is in Hall Lane and the incident happened at 1.30pm.
Two crews from Frinton were sent to the scene along with one from Clacton and they are using a hose reel to tackle the fire, which is affecting several small outbuildings.
The fire was fully extinguished by 2.59pm.
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