Heat flags help communicate the current heat risk level and guide decisions for outdoor work, physical training and events. The flag level is based on WBGT, not just the forecast temperature.
Use the examples below to help identify the appropriate workload level before applying work/rest and fluid replacement guidance.
Easy work
Low-exertion tasks that require light movement or limited physical effort.
Examples: weapon maintenance, marksmanship training, drill and ceremony.
Moderate work
Sustained physical activity that may include movement, lifting, crawling or digging.
Examples: patrolling with a 30-pound load, low crawl, high crawl or digging a defensive position.
Hard work
Strenuous activity that requires sustained effort, heavier loads or faster movement.
Examples: patrolling with a 45-pound load, four-person litter carry or jogging 4 mph.