@hellomiakoda @craignicol @aesthr @mercuryjohn The exact meaning varies between regions, but an “alarm” is a measure of response size. Each is usually ~4 engines, ~2 ladder trucks, and 3-5 people each. Two-alarm is ~8 engines and ~5 ladder trucks, plus a bunch of support staff (rehab unit to help firefighters cool down and hydrate, safety chief, tactical support, communications unit, etc.). Three alarm adds another 4 engines, 2 ladders, and some more specialized support staff. Four alarm adds another 4 and 2, plus planning specialists. Five alarm adds another 4 and 2. This is 30-35 total trucks and ~130 firefighters plus support staff.