It will feel like a sauna outside as the heat index exceeds 105 degrees Tuesday in more than a dozen states.
The combination of high heat and oppressive humidity began reaching dangerous levels over the weekend, spreading from the Midwest to the Gulf Coast.
While temperature may not be record-breaking, highs will hit well into the 90s to around 100 degrees in southeastern South Dakota; the southern half of Iowa; most of Illinois and Indiana; far southern Michigan; northwestern Ohio; western...
https://www.freightwaves.com/news/dangerous-heat-humidity-linger-from-midwest-to-gulf-coast