⚠️ Extreme Heat Warning – Koochiching; North St. Louis; Northern Cook/Northern Lake; North Itasca; Central St. Louis; North Cass; South Itasca; Northern Aitkin; Carlton/South St. Louis; Douglas; Bayfield – Saturday, July 11, 2026

Extreme Heat Warning issued July 11 at 1:33PM CDT until July 14 at 1:00AM CDT by NWS Duluth MN

Details

* WHAT…For the Heat Advisory, heat index values up to 95. For the
Extreme Heat Warning, dangerously hot conditions with heat index
values up to 100 expected.

* WHERE…In Minnesota, Northern Aitkin, Koochiching, North Cass,
Itasca, Carlton, St. Louis, and Northern Cook and Lake Counties.
In Wisconsin, Bayfield and Douglas Counties. This includes the
Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the
Mille Lacs Band, Big Sandy Lake area and the Bois Forte Band, Nett
Lake, Lake Vermilion and, Deer Creek areas. Other locations
including the Apostle Islands National Lakeshore and Voyageurs
National Park. The entire Boundary Waters is also included.

* WHEN…For the Heat Advisory, until 9 PM CDT this evening. For the
Extreme Heat Warning, from 11 AM Sunday to 1 AM CDT Tuesday.

* IMPACTS…Heat related illnesses increase significantly during
extreme heat and high humidity events. Hot temperatures and high
humidity may cause heat illnesses.

* ADDITIONAL DETAILS…Little to no relief from the heat is possible
Sunday night as continued very warm heat indices in the 70s are
forecast Sunday night.

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.