848 WWUS72 KCHS 170547 NPWCHS URGENT - WEATHER MESSAGE National Weather Service Charleston SC 147 AM EDT Mon Aug 17 2026 GAZ217-219-239>241-SCZ045-148>152-171400- /O.NEW.KCHS.XH.A.0005.260818T1500Z-260819T0000Z/ /O.CON.KCHS.XH.W.0007.260817T1500Z-260818T0000Z/ Coastal Bryan-Coastal Chatham-Coastal Liberty-Inland McIntosh- Coastal McIntosh-Inland Berkeley-Beaufort-Coastal Colleton- Charleston-Coastal Jasper-Tidal Berkeley- Including the cities of Fort Mcallister, Goose Creek, Townsend, Jasper, Beaufort, Oak Level, Darien, Charleston, North Charleston, Mount Pleasant, Edisto Beach, Chelsea, Daniel Island, Tybee Island, Moncks Corner, Levy, Hilton Head Island, and Wilmington Island 147 AM EDT Mon Aug 17 2026 ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 112 to 115 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 113 to 117 possible. * WHERE...Portions of southeast Georgia and southeast South Carolina. * WHEN...For the Extreme Heat Warning, from 11 AM this morning to 8 PM EDT this evening. For the Extreme Heat Watch, from Tuesday morning through Tuesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Isolated showers and thunderstorms during afternoon hours could provide relief in some areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. && $$ GAZ216-218-238-SCZ044-147-171400- /O.NEW.KCHS.XH.A.0005.260818T1500Z-260819T0000Z/ /O.CON.KCHS.HT.Y.0024.260817T1500Z-260818T0000Z/ Inland Bryan-Inland Chatham-Inland Liberty-Dorchester-Inland Jasper- Including the cities of Savannah, Hinesville, Saint George, Pembroke, Fort Stewart, Pooler, Ridgeland, Summerville, Richmond Hill, and Garden City 147 AM EDT Mon Aug 17 2026 ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...For the Heat Advisory, heat index values up to 111 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 112 to 115 possible. * WHERE...In Georgia, Inland Bryan, Inland Chatham, and Inland Liberty Counties. In South Carolina, Dorchester and Inland Jasper Counties. * WHEN...For the Heat Advisory, from 11 AM this morning to 8 PM EDT this evening. For the Extreme Heat Watch, from Tuesday morning through Tuesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Isolated showers and thunderstorms during afternoon hours could provide some relief in some areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ GAZ087-088-099>101-114-115-137-SCZ040-042-043-171400- /O.CON.KCHS.HT.Y.0024.260817T1500Z-260818T0000Z/ Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans-Long- Allendale-Hampton-Inland Colleton- Including the cities of Statesboro, Hampton, Rincon, Sylvania, Allendale, Claxton, Yemassee, Springfield, Reidsville, Walterboro, Ludowici, Millen, and Metter 147 AM EDT Mon Aug 17 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 109 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. * ADDITIONAL DETAILS...Isolated showers and thunderstorms during afternoon hours could provide relief in some areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && $$ DPB