Here in Canada, we have one law, coast to coast. No aircraft, I repeat, NO AIRCRAFT of any type shall fly withing 5 nautical miles of any forest fire. The only exception are those aircraft that are directly involved with the fire control / fire fighting. In that category, yes, drones here in Canada have been involved in the use of fighting fires. Mostly mapping and monitoring the spread of the fire, away from the water bombers.
However, back to the original point, near a forest fire - NOTHING flies. No drones, no CF-18 fighter aircraft, no passenger jets, not even Air Fore One. Nada. Zilcho. It is very, very clear. However, in the USA, your laws and regulations are clear as mud.
I was talking last year to some USDA officials at the UAV show in Las Vegas, and they lamented the fact that there is no equivalent law in the USA. It is often decided state by state, and this leads to much confusion. If you Americans had the same law we had here in Canada, then the moment any drone took off, any of your officials - could be local police, park rangers, FBI - anyone could step in and say "stop now."
One more thing, in case you don't know, you really do not want to be withing 5 nm of any forest fire to begin with. Flying or on the ground. Ever hear the old phrase "moves like wildfire?" Well, it's true, and people die. Smoke inhalation, getting lost, somebody has a propane tank in thier back yard that explodes and takes you out - the list of things that can and do go wrong is miles long. Just don't do it unless you have a really good reason to be there.