Extreme Heat Warning: Worth; Hancock; Cerro Gordo; Wright; Franklin; Butler; Bremer; Webster; Hamilton; Hardin; Grundy; Black Hawk; Greene; Boone; Story; Marshall; Tama; Guthrie; Dallas; Polk; Jasper; Poweshiek; Adair; Madison; Warren; Marion; Mahaska; Adams; Union; Clarke; Lucas; Monroe; Wapello; Taylor; Ringgold; Decatur; Wayne; Appanoose; Davis

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Extreme Heat Warning — Worth; Hancock; Cerro Gordo; Wright; Franklin; Butler; Bremer; Webster; Hamilton; Hardin; Grundy; Black Hawk; Greene; Boone; Story; Marshall; Tama; Guthrie; Dallas; Polk; Jasper; Poweshiek; Adair; Madison; Warren; Marion; Mahaska; Adams; Union; Clarke; Lucas; Monroe; Wapello; Taylor; Ringgold; Decatur; Wayne; Appanoose; Davis Severity: Severe. Certainty: Likely. * WHAT...Dangerously hot conditions with heat index values up to around 105 expected. * WHERE...Most of central Iowa * WHEN...Until 10 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Extreme heat will persist through much of next week, potentially including the 4th of July weekend.