WITH GALLERY: Extreme temperatures expected to linger through Friday; heat warning now in effect
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This story was updated at 2:15 p.m. today.
Though thunderstorms pummeled the Ann Arbor area early Thursday morning, hot, humid conditions are expected to linger through the end of the week.
The National Weather Service has cancelled a heat watch for the area, upgrading it to a heat warning that is now in effect through 9 p.m. Friday.
Over the July 4 holiday, the high was 100 degrees, tying the record originally set in 1911, said Dennis Kahlbaum, University of Michigan weather observer.
Temperatures are expected to reach a high of 99 degrees today, with high humidity pushing heat indices up into 105 to 110. Overnight, the temperature is expected to drop to a low near 74 degrees.
Friday’s high will be about 101 degrees, with a low of 71 degrees.
The combination “will add to the heat stress and create a dangerous situation,” according to a statement from the National Weather Service.
The conditions heighten the risk for heat-related illnesses like heat stroke, heat exhaustion and dehydration.
The NWS recommends the following extra precautions for working outside:
- Strenuous activities should be limited to the morning and evening
- Wear lightweight, loose fitting clothing when possible
- Drink plenty of water
- Take frequent breaks in shaded or air conditioned environments
- Call 911 if you suspect heat stroke
Huron Valley Ambulance transported 10 individuals to area hospitals due to heat-related illnesses Wednesday, including heat stroke and heat exhaustion, said Joyce Williams, spokeswoman for the HVA.
Over the last several days, emergency room staff at St. Joseph Mercy Ann Arbor have seen a number of patients with dizziness, weakness, nausea and vomiting related to the heat, said Lauren Jones, spokeswoman for the health system.
A mass of colder, dryer air is expected to move through Michigan over the weekend, pushing the hot, sultry air out, Kahlbaum said.
The air mass is currently in Minnesota and is moving slowly.
A chance of thunderstorms Friday night may break the heat wave, as Saturday’s forecast calls for a high of 88 degrees with a low of 67.
Temperatures have been 90 degrees or higher for the past seven days in a row, Kahlbaum said.
Historical record high temperatures for Ann Arbor:
- Thursday, July 5: 101 degrees in 1911
- Friday, July 6: 100 degrees in 1988
- Saturday, July 7: 100 degrees in 1988
- Sunday, July 8: 102 degrees in 1936