"Always" starring Richard Dreyfuss was an excellent forest fire one, imo, plus romance to boot.

"Fahrenheit 451"

How about "Bambi?" Well, it had a forest fire and disasterous loss of a mother!**bg**

This page at Turner Classic Movies will get your started on 13 pages whcih came up when I did a search using "disaster." (Scroll down a bit to see the links.) While I wait for surgery I've been watching scads of old movies, too many to remember the names unless I write them down. If I think of any specific ones, I'll holler.

kat