At 10.17am on Tuesday (16) one crew from Stanground and one crew from St Ives were called to a fire on Outfield in North Bretton, Peterborough.
Firefighters arrived to find a fire in a house. Wearing breathing apparatus they extinguished the fire using hose reels. One female casualty was taken to hospital by ambulance.
The crews returned to their stations by 11.55am.
The cause of the fire was deliberate. Anyone with information should contact police on 101 or Crimestoppers on 0800 555111.