I should have read further before replying to 407's post.
Deuce, 100', Blackie and Randy. The limits you seem to be referring to mostly were saved from those that would have been much more drastic had CALPA had its way. They were salvaged by operators that, 30 - 40 years ago, were quite comfortable (me included) flying Bell 47's on fires 13 to 15 hours a day, dousing fire with 45-gal. drums of water often hauled several miles on the hook (and uphill both ways, of course).
I guess my point is that we all have our tolerance levels and, although I did bend a machine or two back in my callow youth, the incidents were absolutely unrelated to fatigue. I'll never criticize an individual or a company for maintaining strict duty and flight time standards, but I remember well when we could deal with a situation like today's by pushing that envelope to its limit, and with nothing close to today's accident rates (e.g. summer '02 in Alberta).
I discussed, on another thread, some of the questionable fire-fighting that's done, but the folks in Barriere, Chase, Cranbrook, Kelowna and Osoyoos are thankful that so many of our friends were able to make a big difference in their lives. B)