Puerto Rico extreme heat warnings
There are no extreme heat warnings in Puerto Rico right now. The last one was issued on September 11, 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 Puerto Rico
None right now. Other active alerts in Puerto Rico: 1 (see the Puerto Rico alerts page).
Extreme Heat Warnings in Puerto Rico by year
Puerto Rico averaged 12.9 extreme heat warnings per year from 2016 to 2025, and has had 8 so far in 2026. The most recent was issued on September 11, 2026.
Counties with the most extreme heat warnings
| County | 2016–2025 |
|---|---|
| Culebra Municipio | 50 |
| Vieques Municipio | 30 |
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.