JACKSONVILLE, Fla. – If you thought summer had already arrived, Mother Nature is about to turn up the thermostat even more.
The National Weather Service in Jacksonville is highlighting a significant increase in heat and humidity through the end of the week and into the weekend, with heat index values expected to climb into the dangerous range for many inland communities.
Afternoon temperatures will generally reach the low to mid-90s, but when combined with Florida’s increasing humidity, it will feel much hotter.
Heat index values—what the temperature actually feels like on your body—are forecast to peak between 104° and 108° during the hottest part of the day, especially Saturday afternoon.
Areas including Jacksonville, Gainesville, Lake City, Waycross, and Brunswick could all experience triple-digit heat indices, while even coastal communities such as St. Augustine will see oppressive conditions.
The highest heat stress is expected between noon and 6 p.m. each day, when the sun angle is highest and humidity levels remain elevated.
During this time, outdoor workers, athletes, festival-goers, and anyone spending extended periods outside will need to take extra precautions.
Heat-related illnesses can develop quickly in these conditions.
The National Weather Service recommends staying hydrated, seeking shade whenever possible, wearing lightweight clothing, and taking frequent breaks if working outdoors.
It’s also important to never leave children or pets in vehicles, even for a short period of time, as temperatures inside a parked car can become deadly within minutes.
With numerous outdoor events and summer activities planned across Northeast Florida this weekend, now is the time to prepare.
Make sure you have plenty of water, sunscreen, and a way to escape the heat.
While a few afternoon showers may provide brief relief, the overall story through the weekend will be building heat, increasing humidity, and dangerous heat indices that could make it feel closer to 110° in some locations.
Stay weather aware, check on vulnerable neighbors and family members, and remember: if you’re feeling dizzy, nauseated, or excessively fatigued, move to a cooler location immediately and seek help if symptoms worsen. Summer’s first major heat surge is arriving, and it demands respect.