Up in Smoke -- Description du film [en anglais] :
« Forest-fire fighting in mountainous British Columbia has been developed with the precision of a military operation. This film shows the whole pattern of attack, from the time smoke is sighted from watch-tower or spotter plane until the outbreak is brought under control. Small crews dropped by helicopter, water bombers, chemical-carrying aircraft, or the all-out offensive of a ground attack—all these are ready to swing into action during the critical dry spell of summer. »
-- National Film Board of Canada

Source :
National Film Board of Canada. "NFB -- Up in Smoke" National Film Board of Canada. http://onf-nfb.gc.ca/en/our-collection/?idfilm=11716.