🟡 Moderate

Heat Advisory

Baker; Inland Nassau; Union; Bradford; Inland Flagler; Coastal Nassau; Coastal Duval; Eastern Clay; Eastern Alachua; Eastern Putnam; Coastal Flagler; Eastern Marion; Trout River; Western Clay; Northeast Coastal St. Johns; Western Alachua; Western Putnam; Central Marion; South Central Duval; Southeast Coastal St. Johns; Western Marion; Western Duval; Northern Inland St. Johns; Southern Inland St. Johns; Western St. Johns; Brantley; Inland Glynn; Coastal Glynn; Inland Camden; Coastal Camden; Northeastern Charlton; Southern Ware; Western Charlton

Heat Advisory issued June 18 at 9:19AM EDT until June 18 at 7:00PM EDT by NWS Jacksonville FL

Alert Description

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast and northern Florida and southeast Georgia. * WHEN...Until 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Safety Instructions

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Time Information

Effective

Jun 18, 2026, 4:00 PM

Expires

Jun 18, 2026, 11:00 PM

Issued

Jun 18, 2026, 1:19 PM

Alert Details

Severity

Moderate

Urgency

Expected

Certainty

Likely

Issued By

NWS Jacksonville FL

National Weather Service