Update: heat injuries, active component, U.S. Armed Forces, 2011.

In 2011, the number of service members treated for heat stroke (n=362) was higher than the number in 2010, but lower than the numbers in 2007-2009. Incidence rates of heat stroke were highest among males, service members in combat-specific occupations, in the Marine Corps and Army, and among those younger than 20 years of age. The number of service members treated for "other heat injuries" was higher in 2011 (n=2,652) than in any of the four prior years; however, there were fewer hospitalizations for "other heat injuries" in 2011 than in recent prior years. In contrast to heat stroke, the incidence rate of "other heat injuries" was higher among females than males and the rate among enlisted members was more than twice that of officers.