Maybe somebody ought to write to her and ask her what she meant and what examples there are?
Had a look and see that there was, more recently for instance (not that it was cause) this story:
UFOs Caught By Canadian News Crew During Forest Fire Coverage
In this video a guy actually looks at the California footage and critiques Kostelac's video leaning to a ufo as cause, of course it can't be determined.
There are some other articles on ufo's and grass fires and possibly others - when you get fire the distraction of that alone would perhaps make ufo's, if they were present, more obscure.