MINNEAPOLIS (AP) - Dangerously high heat and humidity is settling into Minnesota.

The National Weather Service expects temperatures Wednesday will feel like 105 degrees because of the high level of humidity. Thursday and Friday are expected to be even more oppressive before cooler weather arrives Saturday with reduced humidity.

The weather service has issued an excessive heat warning for much of the state through Friday. Nighttime temperatures won't likely bring much relief. Readings aren't expected to fall much below 80.

The Salvation Army and other organizations have set up cooling centers for those without air conditioning. Medical experts say heat exhaustion can happen quickly. Symptoms include dizziness, nausea and an increased heart rate.