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Extreme Heat Warning — Dubuque; Jackson; Clinton; Jo Daviess; Stephenson; Carroll; Whiteside; Henry; Bureau; Putnam Severity: Severe. Certainty: Likely. * WHAT...For the Dense Fog Advisory, visibility as low as a quarter mile at times in dense fog. For the Extreme Heat Warning, a dangerous combination of oppressively hot and humid conditions with heat index values between 105 to 115 expected. * WHERE...In Illinois, Bureau, Putnam, Carroll, Henry IL, Jo Daviess, Stephenson, and Whiteside Counties. In Iowa, Clinton, Jackson, and Dubuque Counties. * WHEN...For the Dense Fog Advisory, until 8 AM CDT this morning. For the Extreme Heat Warning, until 10 PM CDT this evening. * IMPACTS...Low visibility could make driving conditions hazardous. Heat related illnesses increase significantly during extreme heat and high humidity events.
The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.