Here's what the Flash and Diana had to say about fighting wildfires in Wonder Woman #197:
WONDER WOMAN: Let it burn.Just to be clear, Wonder Woman is saying they should protect the homes, but let the forest burn itself out. This is a pretty standard firefighting approach, but I'm sure it still freaks people out to see huge fires burning within sight of their homes. My thoughts are with all the victims--which, thankfully, don't include my parents or my sister, who are nowhere near the actual burning.
WW: The forest needs this fire, Flash. It's how it grows, it's how it stays healthy. If you pull the air from it, you will seve nothing but the now to the pain of the future. The next fire will be worse.
F: Do you hear yourself, Diana? This isn't a new age seminar, it's a damn forest fire! We're wasting time--
WW: No, Flash. Let it burn.