Let me tell ya as Norts can attest, fighting a fire is damn hard and exhausting. I never had to go deep into one as a front line fire fighter. They usually put us volunteers on the 2nd line to clear dry shrubs and debris to hopefully stop it from jumping across. But a few times I was in it shoveling to put flames out and you feel the heat and you are wearing heavy gear for protection. When your shift is done you are whooped.