Extreme heat and humidity will roll into Minnesota this weekend. The sauna-like weather will be the first major heat wave of the summer. Temperatures will start to rise on Friday. The tropical air mass will push heat indexes to around 90 to 105 degrees.

Also, more than 23,000 runners are registered for events connected to Grandma’s Marathon in Duluth, including a half and full marathon on Saturday. That number tops last year's record-breaking participation.

This is the afternoon MPR News update, hosted by Emily Reese. Theme music by Gary Meister.