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Heat Advisory Issued for Puerto Rico as Heat Index Could Reach 111 Degrees

13 updates over 26 days — last updated Jul 16, 2026

  1. Increase in Humidity to Raise Heat Index

    via NotiCel

    A decrease in Saharan dust is expected, but small amounts will continue to arrive until the end of the week. Today and tomorrow, humidity will increase, leading to more showers and some thunderstorms, mainly in the afternoon in the interior and west of Puerto…

  2. Heat Advisory Issued for Puerto Rico as Heat Index Could Reach 111 Degrees

    via Primera Hora

    The National Weather Service (NWS) in San Juan reports that Puerto Rico will remain under dry, hot conditions in the coming days due to a combination of Saharan dust and a drier air mass dominating the region.

  3. More Haze and Heat Expected Today

    via NotiCel

    A heat warning is in effect from 10:00 a.m. to 5:00 p.m. for coastal and urban areas of Puerto Rico, with a heat index potentially reaching between 108 and 111 °F, according to the National Weather Service.

  4. Mental Health Patients Face Higher Risk from Extreme Heat, Doctor Warns

    via El Nuevo Día

    Dr. José Massa, psychiatrist and vice president of Medical Affairs at APS Health, warned Monday at a press conference that extreme heat poses particular dangers to psychiatric patients, since some medications alter sweating and body temperature regulation.

  5. Tropical Wave Brings Humidity and Heat to Puerto Rico

    via NotiCel

    A tropical wave passing south of the region will increase humidity today and Monday, leading to more showers, mainly in the interior and western parts of Puerto Rico. The additional humidity will also make the heat index reach between 100 and 111 °F.

  6. Heat Advisory and Wildfire Risk Issued for 61 Puerto Rico Municipalities Amid Saharan Dust

    via El Nuevo Día

    The National Weather Service (NWS) in San Juan issued a heat advisory on Sunday for 61 municipalities across Puerto Rico, Culebra, Vieques and the U.S. Virgin Islands, citing heat indices between 100 and 111 degrees Fahrenheit, in effect from 10:00 a.m.

  7. Puerto Rico Under Extreme Heat: 59 Municipalities Under Advisory, High Wildfire Risk

    via Primera Hora

    The National Weather Service (NWS) issued a heat advisory for 59 Puerto Rico municipalities on Thursday, effective from 10:00 a.m. to 5:00 p.m., with heat indices expected between 102 and 111 degrees Fahrenheit.

  8. Heat Alert Issued for 63 Municipalities in Puerto Rico

    via El Nuevo Día

    The National Weather Service (SNM) in San Juan issued a heat alert for 63 municipalities in Puerto Rico on Monday. Meteorologist Lee Ann Inglés stated that heat indices could reach 108 to 111 degrees Fahrenheit between 10:00 am and 5:00 pm.

  9. Hazy Skies, Extreme Heat, and Fire: Conditions to Expect in Puerto Rico This Weekend

    via Primera Hora

    Puerto Rico is expected to experience dry, windy, and hot conditions this weekend, with a high concentration of Saharan desert dust particles in the air. The weather conditions will bring a high risk of forest fires, particularly in the southern coastal…

  10. Heat, Sahara Dust, and Fireworks: Will it Rain During 4th of July Celebrations?

    via El Nuevo Día

    This 4th of July, Puerto Rico will experience a mix of heat, Sahara dust, and dry conditions, according to meteorologist Carlos Anselmi from the Servicio Nacional de Meteorología (SNM).

  11. Prepare for the Heat! Warning Issued for Much of Puerto Rico

    via Primera Hora

    The National Meteorological Service in San Juan issued a heat warning for much of Puerto Rico on Friday due to the combination of high temperatures and humidity, which could raise the heat index to 111 degrees Fahrenheit.

  12. Sweltering Heat and Dense Sahara Dust Complicate Weather in Puerto Rico

    via Primera Hora

    The weather in Puerto Rico will continue to be marked by intense heat, easterly winds, and high concentrations of Sahara dust, according to the National Meteorological Service (SNM) in San Juan.

  13. Heat Alert Issued for Most of Puerto Rico

    via Primera Hora

    The National Meteorological Service (SNM) in San Juan has issued a heat alert for 61 of Puerto Rico's 78 municipalities, effective from 10:00 a.m. to 5:00 p.m. on Saturday.