Extreme Heat Warning Issued for Puerto Rico
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NWS San Juan PR has issued an Extreme Heat Warning for all of Puerto Rico from 10 AM to 5 PM AST on September 7.
Read this weather record in 30 seconds
- Record type
- Extreme Heat Warning
- Affected area
- Puerto Rico
- Issued
- September 7, 2026
- Issuing authority
- NWS San Juan PR
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Extreme Heat Warning issued by NWS San Juan PR. Effective from 10 AM AST to 5 PM AST on September 7, 2026. Severity: Severe. Certainty: Likely. Urgency: Expected.
Affected Areas
Portions of Puerto Rico, particularly across coastal and urban areas and lower-elevation valleys. Specific zones include San Juan and Vicinity, Northeast, Southeast, Eastern Interior, North Central, Central Interior, Ponce and Vicinity, Northwest, Western Interior, Mayaguez and Vicinity, and Southwest.
What You Should Do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, schedule frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911.
Expected Conditions
This level of heat can affect anyone without effective cooling and/or adequate hydration. Heat-related illnesses increase significantly during periods of very high heat indices or high temperatures. This extreme heat event poses a severe threat to anyone with inadequate cooling or hydration. These extreme impacts will be most pronounced across coastal sections, lowlands, interior valleys, and urban areas. Although passing showers, t-storms and clouds can provide some relief, enough sunshine and moisture is expected for heat indices to reach dangerous levels.
Timeline
Issued September 7 at 2:39 AM AST. Effective from 10 AM AST until 5 PM AST on September 7, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,838 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 7, 2026.
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