On April 6, 1999, two male volunteer fire fighters, ages 28 and 30 years old, died while fighting a wildland fire. The two fire fighters, both members of a volunteer fire department responding to the wildland fire, were constructing a fire line when the fire intensified. Since the fire blocked their escape route, they tried to run up a hollow ahead of the fire. However, due to the rapid flame spread and steep terrain, the two fire fighters were killed trying to escape. On April 27, 1999, two Safety and Occupational Health Specialists from NIOSH, Division of Safety Research, investigated the incident.