The number of extremely hot days in eastern and midwestern U.S. cities is projected to triple by mid-century, according to a new study led by University of Wisconsin–Madison researchers and published today in the Journal of the American Medical Association.

Milwaukee and New York City could experience three times as many 90-degree days by 2046; Dallas could see twice as many days topping 100 degrees. The new analysis offers climate data through the lens of public health, in a study that represents a synthesis of the latest science at the intersection of climate change and human health.