Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Jo Daviess-
Stephenson-Carroll-
Including the cities of Vinton, Dubuque, Manchester, Galena,
Freeport, Maquoketa, Cedar Rapids, Independence, Mount Carroll,
and Anamosa
746 PM CDT Tue Jun 30 2026

…EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT
WEDNESDAY…

• 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, Carroll, Jo Daviess, and Stephenson Counties.
  In Iowa, Benton, Jackson, Jones, Linn, Buchanan, Delaware, and
  Dubuque Counties.
• WHEN…Until 10 PM CDT Wednesday.
• 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.