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Miami records hottest day ever since 1942; record warmth possible again Wednesday

A heat advisory covered South Florida as forecasters warned the heat index could reach 112 and another record-warm day was possible Wednesday.

  • On Tuesday, Miami reached 100°F, tying the city's all-time record high set 84 years ago in 1942. This marks only the second time since records began in 1895 that the city has hit triple digits.
  • A powerful heat dome settled over South Florida, trapping hot air beneath it, while westerly winds blocked the Atlantic Ocean's cooling sea breeze. This atmospheric setup prevented the ocean's natural air-conditioning effect from developing along the coastline.
  • Fort Lauderdale matched its hottest temperature of the year at 97°F, while heat index values reached as high as 112°F across the region. The combination of extreme temperatures and high humidity created dangerous conditions throughout South Florida.
  • Officials urge residents to stay hydrated and limit outdoor activity, warning that prolonged exposure to such temperatures risks heat exhaustion or heat stroke. Health expert Dr. Jorge Vallejo stressed that dehydration can cause "dizziness, weakness, fatigue, even perhaps heat stroke."
  • Meteorologists expect relief later this week as a pattern change brings afternoon thunderstorms back to the forecast. These storms should provide cooling relief and much-needed rainfall across South Florida and coastal areas.
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Miami, Florida, recorded a maximum temperature of 100°F (37.8°C) on Tuesday. The only previous record high recorded there was in 1942.

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Islander News broke the news on Tuesday, August 18, 2026.
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