Heat Index

Alert level

Possible heat disorder

80˚F - 90˚F

Caution

Fatigue is possible with prolonged exposure and activity

90˚F - 105˚F

Extreme caution

Sunstroke, heat cramps and heat exhaustion

105˚F - 130˚F

Danger

Sunstroke, heat cramps and heat exhaustion likely, and heat stroke

130˚F or greater

Extreme danger

High heat stroke by continuous exposure