Tennessee extreme heat warnings
There are no extreme heat warnings in Tennessee right now. The last one was issued on August 19, 2026.
Dangerous, potentially deadly heat is expected. Stay cool and check on vulnerable people.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
Active extreme heat warnings in Tennessee
None right now. Other active alerts in Tennessee: none.
Extreme Heat Warnings in Tennessee by year
Tennessee averaged 5 extreme heat warnings per year from 2016 to 2025, and has had 10 so far in 2026. The most recent was issued on August 19, 2026.
Counties with the most extreme heat warnings
| County | 2016–2025 |
|---|---|
| Shelby County | 37 |
| Lauderdale County | 33 |
| Tipton County | 31 |
| Dyer County | 30 |
| Lake County | 29 |
| Obion County | 28 |
| Fayette County | 21 |
| Gibson County | 20 |
| Crockett County | 20 |
| Haywood County | 20 |
What a extreme heat warning means
An extreme heat warning (formerly the excessive heat warning) is the highest heat alert. It is issued when the heat index or air temperature reaches dangerous levels, often for several days, with little relief overnight.
More about extreme heat warnings and the national map →
What to do
- Stay in air conditioning as much as possible.
- Check on older relatives and neighbors at least twice a day.
- Reschedule outdoor work to early morning.
More Tennessee alerts
- Tornado Warnings
- Tornado Watches
- Severe Thunderstorm Warnings
- Flash Flood Warnings
- Flood Warnings
- Flood Watches
- Winter Storm Warnings
- Winter Storm Watches
- Winter Weather Advisories
- Cold Weather Advisories
- Freeze Warnings
- Frost Advisories
- Heat Advisories
- High Wind Warnings
- Wind Advisories
- Dense Fog Advisories
- All Tennessee alerts