An "extreme heat belt" extending as far north as Chicago is forming.

According to new statistics on the country's heat hazards, a corridor that passes across the centre of the country would affect more than 107 million people over the next 30 years.

The First Street Foundation, a research organisation, discovered that along a column of America's heartland running from Texas and Louisiana north to the Great Lakes,

By 2053, residents may endure heat index values of more than 125 degrees Fahrenheit.

circumstances more often seen in Death Valley, California, or portions of the Middle East

As a result of climate change, heat index temperatures will exceed 100 degrees Fahrenheit during the next 30 years.

When humidity and air temperature are combined, the heat index indicates how a temperature feels to the human body.

"Increasing heat affects everyone, whether it's absolute increases in hazardous days or just a local hot day," said First Street Foundation's principal research officer.