Which type of fuel has historically caused the most firefighter fatalities?

• A. Timber
• B. Grass
• C. Brush
• D. Crops

Answer: (B)

The main concept being tested is how the nature of the fuel affects fire behavior and the risk it poses to firefighters. Grass fuels are fine, highly drier fuels that ignite easily and can carry fire with an exceptionally fast rate of spread, especially under wind and dry conditions. This rapid growth of the flame front, combined with the tendency for grass fires to move across open ground and along roads or ridges, can leave crews with little time to react, forcing sudden changes in direction or trapping them on slope or at edge conditions. Embers can also jump ahead and start spot fires, complicating suppression and escape routes. These characteristics have historically led to more fatalities on grass fires than on larger, bulkier fuels like timber or brush, where line construction and suppression tactics can more often be set up with safer, slower-progressing fire behavior. Crops can be dangerous too, but grass fires have shown the highest fatality incidence due to their speed and ubiquity in many landscapes.