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Another steamy day in Minnesota, followed by cooler air and some rain

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It's another hot and steamy day across Minnesota and the Upper Midwest. High temperatures were expected to be in the 90s across most of the region Saturday. Along with high humidities, the heat index readings approached 100 degrees.

A heat advisory was posted for much of North and South Dakota, part of northwestern Minnesota and the Twin Cities metro area until 7 p.m. Saturday.

The risk of heat-related illnesses increases for people who spend time outside or don’t have an air conditioner, according to the National Weather Service.

It recommends taking extra precautions if you work outside, and suggests rescheduling strenuous outdoor activities to early morning or late evening if possible. Wearing loose-fitting clothing and drinking lots of water are also suggested.

The mini-heat wave began on Friday, when hot and humid weather moved in over the region, bringing with it the high heat indexes.

Friday night, it was still 85 degrees in the Twin Cities at 10 p.m., and the heat index at that time was still at 90 degrees, the National Weather Service said.

Actually we haven't had all that many days of 90 degrees or more this summer. But several cities in the area broke that mark for high temperatures this week.

The high temp at MSP airport was 91 degrees on Saturday, and 94 on Friday. In St. Cloud, it was 87 on Saturday and 91 on Friday.

And it certainly could be a lot worse. By comparison, Phoenix reached 117 degrees Friday for a high, and the low temperature was 93 degrees.

Cooler Saturday night, possibly stormy

After another blistering Saturday day, cooler air is expected to advance into Minnesota after a cool front drives through the state Saturday night into Sunday, according to MPR.

Showers and a few storms will spread from west to east on Sunday.

The storms are likely to develop in the Dakotas Saturday night before advancing through Minnesota, the Grand Forks Herald notes. And the National Weather Service issued a severe thunderstorm watch for parts of the Dakotas and a small portion of northwest Minnesota, effective until 1 a.m. Sunday.

On Sunday, we should see more cloudy conditions with temperatures topping out in the low to mid-80s, as well as some scattered showers and a possible thunderstorm, the NWS notes.

Next week, the weather will be quite different, with several chances for significant rainfall and much cooler temperatures. Highs will mainly be in the 70s, but they may struggle to get out of the 60s on Wednesday, according to the weather service. By the end of next week, we'll be back to normal temperatures for this time of year.

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