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National Weather ServicePuerto RicoExtreme Heat WarningArchive to October 1, 2026

Extreme Heat Warnings in Puerto Rico

The National Weather Service issued 16 extreme heat warnings for Puerto Rico in 2025 and 7 a year on average in 2008-2025; in 2021-2025 it had the 6th most of any state. 2026 through September: 8, 29% above the average of 6 for those months in 2008-2025. North Central was covered most often (130 times since 2008).

How many extreme heat warnings does Puerto Rico get?

16 extreme heat warnings for Puerto Rico in 2025
204060802008: 020082009: 020092010: 020102011: 020112012: 020122013: 020132014: 020142015: 020152016: 020162017: 020172018: 020182019: 020192020: 020202021: 020212022: 120222023: 6720232024: 4520242025: 1620252026: 820262008-2025 average 72026 through September: 8204060802008: 020082009: 02010: 020102011: 02012: 020122013: 02014: 020142015: 02016: 020162017: 02018: 020182019: 02020: 020202021: 02022: 120222023: 672024: 4520242025: 162026: 820262008-2025 average 72026 through September: 8204060802008: 020082009: 02010: 020102011: 02012: 020122013: 02014: 020142015: 02016: 020162017: 02018: 020182019: 02020: 020202021: 02022: 120222023: 672024: 4520242025: 162026: 820262008-2025 average 72026 through September: 8204060802008: 020082009: 02010: 02011: 02012: 02013: 02014: 02015: 020152016: 02017: 02018: 02019: 02020: 020202021: 02022: 12023: 672024: 452025: 162026: 820262008-2025 average 72026 through September: 8

Every extreme heat warning that covered part of Puerto Rico. 2026 is an outline: the year is not over.

The numbers
YearCount
2026 (through September)8
202516
202445
202367
20221
20210
20200
20190
20180
20170
20160
20150
20140
20130
20120
20110
20100
20090
20080

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.

When in the year does Puerto Rico get them?

Puerto Rico's extreme heat warnings by month, 2008-2025
2040Jan: 0JanFeb: 0FebMar: 0MarApr: 0AprMay: 5MayJun: 30JunJul: 13JulAug: 32AugSep: 32SepOct: 17OctNov: 0NovDec: 0Dec322040Jan: 0JanFeb: 0FebMar: 0MarApr: 0AprMay: 5MayJun: 30JunJul: 13JulAug: 32AugSep: 32SepOct: 17OctNov: 0NovDec: 0Dec322040Jan: 0JanFeb: 0FebMar: 0MarApr: 0AprMay: 5MayJun: 30JunJul: 13JulAug: 32AugSep: 32SepOct: 17OctNov: 0NovDec: 0Dec322040Jan: 0JFeb: 0FMar: 0MApr: 0AMay: 5MJun: 30JJul: 13JAug: 32ASep: 32SOct: 17ONov: 0NDec: 0D32

Sum of 2008-2025; the busiest month is labelled.

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.

Where in Puerto Rico?

County or forecast zoneSince 2008Since 2023Last issued
North Central130129September 11, 2026
Northwest104104September 11, 2026
San Juan and Vicinity9493September 11, 2026
Mayaguez and Vicinity9494September 11, 2026
Southwest6161September 11, 2026
Ponce and Vicinity5555September 11, 2026
Culebra5151July 30, 2026
Southeast4848September 11, 2026
Northeast4040September 11, 2026
Vieques3131July 30, 2026
Eastern Interior2727September 11, 2026
Western Interior66September 11, 2026

The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.

The latest extreme heat warnings for Puerto Rico in AreaZine's record

This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.

Source: National Weather Service alerts (api.weather.gov).

What is an extreme heat warning?

An extreme heat warning means dangerous heat is expected, measured by heat index or temperature thresholds each office sets. It replaced the excessive heat warning in 2025. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. AreaZine's counts include the excessive heat warnings issued before the change. The national record · Every warning type in Puerto Rico.