I was at Ft. Benning, GA one time and a squirrel got into a transformer and shorted something out. It knocked-out power to most of the base. They didn’t seem to have much of a back-up power system on base either. Perhaps for the critical communications or something, but I don’t really know for sure. It took several hours to restore power.
I was in “N” tunnel at the Nevada Test Site preparing for a nuke test back in the day. A ground squirrel got into a transformer. A mile and a half in it gets real dark... real fast.