San Juan recorded a high temperature of 94 degrees Fahrenheit, breaking the previous daily record of 93 degrees set in 1984 and tied in 2013, according to the National Weather Service (NWS). The milestone arrived as dangerous heat conditions prompted extreme heat advisories and warnings across Puerto Rico.
Extreme Heat Warnings Across Puerto Rico
The NWS upgraded existing heat advisories to an extreme heat warning for urban and coastal areas across the island, affecting 59 municipalities. According to NWS meteorologist Emanuel Rodríguez, this marks the first extreme heat warning issued since October 1, 2025, a span of approximately 300 days. Federal forecasters caution that the high temperatures pose health risks to individuals sensitive to extreme heat, particularly those lacking adequate cooling systems or sufficient hydration.
Heat-related illnesses surge during periods of high temperatures and elevated humidity. Officials recommend limiting outdoor activities, drinking plenty of water, and remaining in air-conditioned or shaded spaces whenever possible.
Drought Conditions and Water Conservation Urged
The record-breaking heat coincides with a severe lack of rainfall. July 2026 is on track to become the driest July since weather records began at the San Juan airport station in 1898. Additionally, the month ranks as the second-hottest July in the station’s historical database.
To combat a growing rainfall deficit and expanding drought conditions, the Puerto Rico Aqueduct and Sewer Authority (AAA) issued a public appeal for the prudent use of drinking water. The agency aims to preserve reservoir levels and stave off formal water rationing plans.
Frequently Asked Questions
What was the previous temperature record for San Juan on this date?
The previous record was 93 degrees Fahrenheit, which was set in 1984 and tied in 2013, per NWS data.
How many municipalities are under the extreme heat warning?
A total of 59 municipalities across Puerto Rico’s urban and coastal zones are covered by the extreme heat warning.
Why is the Puerto Rico Aqueduct and Sewer Authority asking for water conservation?
The AAA urges residents to conserve water due to an ongoing rainfall deficit and expanding drought conditions that threaten reservoir levels.
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