First Use of a Helicopter for Firefighting
Nearing the end of WWII Sikorsky was delivering many models of helicopter to several branches of the military and receiving orders for more; all other orders were low priority. Forest managers continued to watch the development of helicopters and contemplated how they might be used post-war.
Source: First Use of a Helicopter for Firefighting – June 26th, 1946 | NWCG