Jacksonville, Florida – Scorching heat is set to grip Northeast Florida on Wednesday, July 30th, with Jacksonville and the entire I-95 corridor bracing for the summer’s most dangerous temperatures. A life-threatening heat index up to 111° will force residents indoors and place thousands at risk for heat-related illnesses.
According to the National Weather Service in Jacksonville, an Extreme Heat Warning remains in effect from noon until 7 p.m. Wednesday for Duval, Nassau, Clay, St. Johns, and neighboring counties. The warning covers key travel routes including I-95, US-1, and I-10. Forecasters expect the air temperature to soar near 97°, with high humidity driving the “feels like” reading into the triple digits. Officials urge everyone to stay in air-conditioned spaces, limit outdoor activities, and never leave children or pets in parked vehicles—even for a few minutes.
Heat-related illnesses can strike quickly. Jacksonville’s first responders are on alert for cases of heat exhaustion and heat stroke, especially among outdoor workers, the elderly, and vulnerable populations. If you must be outside, wear light, loose-fitting clothing, drink water often, and take frequent breaks in the shade. Community cooling centers are open across the city.
This brutal stretch follows several days of relentless heat. Highs will hover in the upper 90s for the rest of the week, with only a slight break as scattered thunderstorms return Thursday and Friday afternoons. Rain chances reach 40% Friday and increase to 80% Saturday and Sunday, offering some relief but also the risk of lightning and heavy downpours.
Warnings remain in effect through Wednesday evening. Stay tuned for further advisories as heat and storm threats continue into the weekend.
Five-Day Jacksonville Forecast
Wednesday, July 30:
Sunny, dangerously hot. High 97°F. Heat index as high as 111°. 30% chance of afternoon thunderstorms.
Thursday, July 31:
Sunny, breezy. High 97°F. Afternoon storms possible (30% chance). Low 79°F.
Friday, August 1:
Partly sunny, scattered afternoon storms (40% chance). High 96°F. Low 79°F.
Saturday, August 2:
Showers and storms likely (80% chance). High 95°F.
Sunday, August 3:
Showers and storms likely (80% chance). High 90°F.
Monday, August 4:
Continued storms likely (90% chance). High near 90°F.
