Temperatures could soar up to 20 degrees above average, pushing heat indices well into the triple digits.
The majority of Ohio has been under an excessive heat warning, according to NWS, and a spokesperson for the AEP Ohio electric company told CNN that some customers should be prepared for outages that will last. until Thursday.
Columbus Mayor Andrew Ginther on Wednesday called on residents to use cooling centers and swimming pools to beat the heat and to watch neighbors as power slowly comes back online.
Schools have been forced to change schedules due to excessive heat. In Wisconsin, where a heat index of 108 degrees Fahrenheit was recorded by the NWS on Tuesday at Milwaukee Mitchell International Airport, Milwaukee Public Schools dismissed students early and said they would do so again on Wednesday .
“Young children and people with certain health conditions are particularly vulnerable to heat-related distress,” the MPS announced on its website. “For everyone’s safety, the district has decided to shorten the school day.”
More than a dozen Minnesota schools that are not fully air-conditioned switched to online learning on Tuesday, according to Minneapolis Public Schools. Detroit Public Schools announced it would close all in-person schools three hours early through Friday due to extreme heat.
Relief could soon arrive for the Midwest as the heat is expected to break late Wednesday, with a cold front bringing cooler temperatures, scattered showers and thunderstorms.
Temperatures will drop to more average levels as the front moves through Minneapolis on Wednesday afternoon and Chicago on Wednesday night. The cold front is expected to cross Ohio by Thursday.
Still, even with temperatures dropping a few degrees, particularly across the Upper Midwest, temperatures across much of the region will remain above normal, with areas of record high temperatures persisting into the latter part of the week. .
On Thursday, temperatures are expected to climb well above normal for much of the Great Basin, the Rockies and the Southwest. An excessive heat warning has also been issued for parts of the southern California and Arizona interior, where daytime highs are again expected to climb into the triple digits.
Wildfires rage in Arizona, New Mexico
A second fire a few miles away, the Haywire Fire, has burned about 4,000 acres, according to InciWeb, and both fires remain 0% contained.
New Mexico firefighters are battling the two largest wildfires in state history, the Hermits Peak/Calf Canyon Fire just northeast of Santa Fe and the Black Fire in the Gila National Forest. They burned over 600,000 acres combined.
“More than 6,200 wildland firefighters and support personnel are assigned to incidents,” the NIFC said Tuesday.
CNN’s Robert Shackelford, Judson Jones, Theresa Waldrop, Andy Rose and Dave Alsup contributed to this report.