The National Weather Service has issued a heat advisory from noon to 8 p.m. in western and central Minnesota, in a line from St. James to the Twin Cities metro and Rush City, with hazardous heat indices from 97 to 102 expected.
It'll be the first 90-degree day in a month for many cities, the weather service notes.
The heat advisory affects 31 counties, including Ramsey and Hennepin. The high temperature for the Twin Cities will be about 93 degrees Tuesday, and about the same Wednesday, KARE 11 reports. A thunderstorm in the metro is possible Wednesday, the station reports.
Duluth is expected to break a high-temperature record of 89 for this day. With humidity factored in, the heat index could hit 105 degrees across parts of the Northland, the Duluth News Tribune reports. “It’s rare to get to 90 degrees in Duluth, very rare to get a 90 in August ... and to get a heat index over 100, that just doesn’t happen here,” Dean Packingham, National Weather Service meteorologist in Duluth, told the newspaper.
Heat advisories direct people to take special precautions when working or playing outdoors, and to check on elderly relatives and neighbors. High temperatures plus high humidity increase the risk of heat-related illnesses. The Centers for Disease Control and Prevention released a report in June that said the U.S. averages 658 deaths a year from extreme heat, which is more than the number of fatalities caused by tornadoes, hurricanes, floods and lightning combined.