Extreme Heat Watch: Inland Bryan; Coastal Bryan; Inland Chatham; Coastal Chatham; Inland Liberty; Coastal Liberty; Inland McIntosh; Coastal McIntosh; Inland Berkeley; Inland Jasper; Beaufort; Coastal Colleton; Charleston; Coastal Jasper; Tidal Berkeley

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Extreme Heat Watch — Inland Bryan; Coastal Bryan; Inland Chatham; Coastal Chatham; Inland Liberty; Coastal Liberty; Inland McIntosh; Coastal McIntosh; Inland Berkeley; Inland Jasper; Beaufort; Coastal Colleton; Charleston; Coastal Jasper; Tidal Berkeley Severity: Severe. Certainty: Likely. * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 114. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 115 possible. * WHERE...Portions of southeast Georgia and southeast South Carolina. * WHEN...For the Extreme Heat Warning, until 8 PM EDT this evening. For the Extreme Heat Watch, from Saturday morning through Saturday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...For the Extreme Heat Warning, the highest heat index values are expected from noon through 5 PM today. Additionally, isolated showers and thunderstorms during the afternoon may provide relief in some areas.