Extreme Heat Warning: Clinton; Whiteside; Henry; Bureau; Putnam

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Extreme Heat Warning — Clinton; Whiteside; Henry; Bureau; Putnam Severity: Severe. Certainty: Likely. * WHAT...Dangerously hot and humid conditions with multiple days of heat index values of 100 to 110 expected, along with nighttime lows not falling below the mid to upper 70s. * WHERE...In Illinois, Bureau, Putnam, Henry IL, and Whiteside Counties. In Iowa, Clinton County. * WHEN...Until 10 PM CDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The extreme heat may persist through late week, but thunderstorms and associated clouds may interrupt the heat at times Thursday and Friday.