A 90-year-old woman was treated for minor smoke inhalation after a fire at a house in Bitton.
Firefighters from Keynsham and Brislington were called out to the property at around 10.15pm on Monday night.
The elderly occupant had suffered minor smoke inhalation but did not need to be taken to hospital.
Crews extinguished the flames in the kitchen, which had been started accidentally because of a fault with the dishwasher.