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Heat Advisory

◍ Long · USA · updated 8/21/2026, 6:04:00 AM

⏱ In effect until 10:15 AM UTC-4

Severity score

65/100

Confidence

High

Why this matters

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of southeast Georgia and southeast South Carolina. * WHEN...From 11 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Key stats

Severity

Moderate

Certainty

Likely

Urgency

Expected

Timeline

Heat Advisory
8/21/2026, 6:04:00 AM
Heat Advisory issued August 21 at 2:04AM EDT until August 21 at 8:00PM EDT by NWS Charleston SC

Sources & attribution

OfficialNWS NWS Charleston SCupdated 8/21/2026, 6:04:00 AM

OfficialNWS NWS Shreveport LAupdated 8/21/2026, 5:29:00 AM

OfficialNWS NWS Miami FLupdated 8/21/2026, 5:15:00 AM

OfficialNWS NWS Newport/Morehead City NCupdated 8/21/2026, 5:13:00 AM

OfficialNWS NWS Norman OKupdated 8/21/2026, 5:06:00 AM

OfficialNWS NWS Dodge City KSupdated 8/21/2026, 5:03:00 AM

OfficialNWS NWS Houston/Galveston TXupdated 8/21/2026, 4:52:00 AM

OfficialNWS NWS Jacksonville FLupdated 8/21/2026, 4:46:00 AM

OfficialNWS NWS Lake Charles LAupdated 8/21/2026, 4:09:00 AM

OfficialNWS NWS Amarillo TXupdated 8/21/2026, 4:04:00 AM

OfficialNWS NWS Tulsa OKupdated 8/21/2026, 4:03:00 AM

OfficialNWS NWS Corpus Christi TXupdated 8/21/2026, 3:48:00 AM

OfficialNWS NWS Salt Lake City UTupdated 8/21/2026, 3:43:00 AM

OfficialNWS NWS Lubbock TXupdated 8/21/2026, 3:33:00 AM

OfficialNWS NWS Birmingham ALupdated 8/21/2026, 2:40:00 AM

OfficialNWS NWS Mobile ALupdated 8/21/2026, 12:34:00 AM

OfficialNWS NWS Tallahassee FLupdated 8/20/2026, 6:21:00 PM

OfficialNWS NWS Spokane WAupdated 8/20/2026, 5:28:00 PM

OfficialNWS NWS Missoula MTupdated 8/20/2026, 4:25:00 PM

⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.