Heat Advisory Issued for Southwest Florida with Heat Index Up to 109°F
Heat Advisory Issued for Southwest Florida with Heat Index Up to 109°F
US · Published Aug 11, 2026
• A Heat Advisory is in effect for portions of southwest and west-central Florida, including Fort Myers and southern Collier County, from 12:00 PM EDT to 7:00 PM EDT on Tuesday, August 11,
• Heat index values are expected to reach up to 109°F (42.8°C), posing a risk of heat-related illnesses. Additionally, a Flood Advisory is active for southern Collier County until 5:45 PM EDT. The weather forecast indicates sunny to partly cloudy conditions with a chance of stray showers or thunderstorms. High temperatures are expected to reach 94°F (34.4°C) during the day, with lows around 77°F (25°C) at night.

Impact & Risks

The high heat index values and elevated humidity levels may lead to heat-related illnesses, particularly for vulnerable populations such as the elderly, children, and those with pre-existing health conditions. Outdoor workers and individuals engaging in strenuous activities are at increased risk. The Flood Advisory for southern Collier County suggests localized flooding may occur in low-lying or poorly drained areas.

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