Extreme heat warning issued through tonight as brutal triple-digit heat index continues

High humidity drives heat index above 110 degrees, while quick pop-up showers could bring slight relief

JACKSONVILLE, Fla. – Jacksonville and nearby areas are facing the hottest day of the week as an extreme heat warning remains in effect until 7 p.m.

The day is off to a sizzling start, with temperatures already in the 80s at 6:18 a.m. and the heat index making it feel like the 90s in some places.

Throughout the day, the “feels like” temperature is forecast to soar to between 111 and 113 degrees, making outdoor conditions especially uncomfortable.

Areas like Green Cove Springs, Orange Park, Brunswick, and Macclenny could see actual temperatures hit 100 degrees or higher by the afternoon.

The Weather Authority’s Exact Track 4D maps show much of the First Coast and Georgia coastal areas under the same oppressive air mass, with little breeze to offer relief.

Potential relief from showers

According to the latest Exact Track 4D radar, the intense heat is expected to continue throughout the day, with the temperature rising quickly through the morning hours.

In Jacksonville, it could feel like 100 degrees as early as 8:30 a.m. and close to 110 degrees by late morning.

By the time the afternoon hits, the “feels like” readings are forecast to hang in the range of 112 degrees or higher, and the humidity is set to keep things stifling.

There is, however, a chance for pop-up showers between 2 p.m. and 10 p.m. While these brief showers are expected to be light, anything helps when it comes to relief from this heat.

Still, the forecast suggests humidity will keep conditions sultry even after any rainfall moves through.

Looking into the weekend, temperatures around Jacksonville and surrounding counties are predicted to settle into the low to mid-90s, with more consistent rain chances returning by Sunday and Monday. This should help bring some gradual moderation to the extremes.

Heat safety

With the heat index at dangerous levels, everyone is advised to take frequent breaks when outside, especially during peak heat.

Whether you’re planning to head to the beach—with a low rip current risk today—or tee off for a round of golf, consider taking a clubhouse break every hour or finding shade regularly.

These small steps can make a big difference in keeping cool and safe as the mercury climbs.

Got creative ways to beat the heat or impressive summer sunrise photos? Share your weather snapshots with News4JAX using SnapJAX—you might see your images featured on air or online.


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