Heat Index Calculator

Calculate Heat Index

Heat Index Results

Enter temperature and humidity to calculate heat index

Understanding Heat Index

Risk Levels

Safe

  • Normal outdoor activities can be conducted
  • Stay hydrated

Caution

  • Take breaks in shade
  • Drink plenty of water

Warning

  • Reduce outdoor activities
  • Drink water frequently

Danger

  • Avoid outdoor activities
  • Stay in air-conditioned areas

Heat-Related Illness Signs

Heat Exhaustion

  • Heavy sweating
  • Cool, pale skin
  • Dizziness, headache
  • Muscle cramps

Heat Stroke

  • High body temperature
  • Hot, red skin
  • Rapid pulse
  • Confusion or unconsciousness

Prevention Tips

  • Stay hydrated with water and electrolytes
  • Avoid alcohol and caffeine
  • Wear light, loose-fitting clothing
  • Schedule outdoor activities during cooler hours
  • Take frequent breaks in air-conditioned areas