Heat Index Map
Monitor extreme heat conditions across the United States with our interactive heat index map.
Current Heat Conditions
Heat Index Legend
Level 0: Little to no heat
Level 1: Mild heat
Level 2: Moderate heat
Level 3: High heat
Level 4: Extreme heat
Heat Safety Tips
For Extreme Heat (Level 4)
- Stay indoors in air-conditioned areas
- Drink plenty of water, even if not thirsty
- Avoid outdoor activities, especially during peak hours
- Check on elderly or vulnerable individuals
- Never leave children or pets in vehicles
For High Heat (Level 3)
- Limit outdoor activities to morning and evening
- Take frequent breaks if working outdoors
- Wear lightweight, light-colored clothing
- Use sunscreen with SPF 15 or higher
- Drink water regularly throughout the day
Signs of Heat-Related Illness
- Headache, dizziness, or fainting
- Excessive sweating or hot, dry skin
- Nausea or vomiting
- Rapid heartbeat
- Confusion or disorientation
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