Extreme Heat Warning issued August 29 at 3:43AM AST until August 29 at 5:00PM AST by NWS San Juan PR

Published: 29 August 2025
Categories: National Weather Service

RSS feed source: US National Weather Service

* WHAT…This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure. * WHERE…All coastal and urban areas of Puerto Rico, as well as the valleys of the eastern interior. * WHEN…From 10 AM this morning to 5 PM AST this afternoon. * IMPACTS…Heat related illnesses increase significantly during extreme heat and high humidity events.

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Heat Advisory issued August 29 at 3:43AM AST until August 29 at 5:00PM AST by NWS San Juan PR

Published: 29 August 2025
Categories: National Weather Service

RSS feed source: US National Weather Service

* WHAT…This level of heat affect most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health system and in heat-sensitive industries. * WHERE…St. Thomas, St. John, St. Croix, Vieques and Culebra. * WHEN…From 10 AM this morning to 5 PM AST this afternoon. * IMPACTS…Hot temperatures and high humidity may cause heat illnesses.

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Popocatépetl Volcano Volcanic Ash Advisory: NEW VA EMS. to 20000 ft (6100 m)

Published: 29 August 2025
Categories: Global Volcano Activity

RSS feed source: US National Weather Service

Background:

Volcán Popocatépetl, whose name is the Aztec word for smoking mountain, towers to 5426 m 70 km SE of Mexico City to form North America’s 2nd-highest volcano.  The glacier-clad stratovolcano contains a steep-walled, 250-450 m deep crater.  The generally symmetrical volcano is modified by the sharp-peaked Ventorrillo on the NW, a remnant of an earlier volcano. 
At least three previous major cones were destroyed by gravitational failure during the Pleistocene, producing massive debris-avalanche deposits covering broad areas south of the volcano.  The modern volcano was constructed to the south of the late-Pleistocene to Holocene El Fraile cone.  Three major plinian eruptions, the most recent of which took place about 800 AD, have occurred from Popocatépetl since the mid Holocene, accompanied by pyroclastic flows and voluminous lahars that swept basins below the volcano.  Frequent historical eruptions, first recorded in Aztec codices, have occurred since precolumbian

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