⚠️ Heat Advisory – Sac; Calhoun; Webster; Hamilton; Hardin; Grundy; Black Hawk – Friday, September 4, 2026

Heat Advisory issued September 4 at 3:05AM CDT until September 5 at 7:00PM CDT by NWS Des Moines IA

Details

* WHAT…Heat index values up to 105 expected.

* WHERE…Grundy, Hamilton, Hardin, Webster, Black Hawk, Calhoun, and
Sac Counties.

* WHEN…From 1 PM this afternoon to 7 PM CDT Saturday.

* IMPACTS…Hot temperatures and high humidity may cause heat
illnesses.

* ADDITIONAL DETAILS…While heat index values may not reach 105
degrees each day, the combination of the longevity of the heat and
little or limited relief during the overnight periods with warm
lows have prompted the multi-day Heat Advisory.

Instructions

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.