From the US Fire Administration:

The objective of the U.S. Fire Administration (USFA) study “Firefighter Fatalities in the United States” is to identify and analyze all on-duty firefighter fatalities to increase understanding of their causes and how they can be prevented. The study is intended to help identify approaches that could reduce the number of deaths in future years.

On-duty firefighter deaths in 2018

44 Volunteer
33 Career
5 Wildland
82 Firefighters died while on duty.
33 Firefighters died from heart attacks.
42 Firefighters died from activities related to an emergency incident.
30 Firefighters died from activities at a fire scene.
9 Firefighters died while participating in training activities.
10 Firefighters died while responding to or returning from emergency incidents.

Download the report