You either need large payloads or large numbers, but Thousands of drones flying around would likely lead to accidents. Accidents woudl likely lead to new fires, considering most of these things are happening in areas that are tinderboxes with significant aggrivating factors (high winds, exposure, etc).
The strategy for containing these fires is typically fuel deprivation, rather than "flame extinguishment" which is so difficult if not impossible for the above reasons. The guys that jump out of planes to fight backcountry fires, for example, are armed with axes and saws. Absent something like a star-wars (AT-AT) its not clear a direct frontal confrontation is pyhsically feasible, even from the air, for many fires.
The strategy for containing these fires is typically fuel deprivation, rather than "flame extinguishment" which is so difficult if not impossible for the above reasons. The guys that jump out of planes to fight backcountry fires, for example, are armed with axes and saws. Absent something like a star-wars (AT-AT) its not clear a direct frontal confrontation is pyhsically feasible, even from the air, for many fires.