By Alexandra Sifferlin for TIME Magazine.

Just a day after the People’s Climate March, one of the largest international environmental marches, a new analysis of 56 studies on climate change-related health problems shows that increasingly, global temperatures and severe weather events will continue to have a major impact on global health.

In the U.S. alone, several cities are expected to experience many more frequent hot days by the year 2050, and New York City and Milwaukee for example, may have three times their current average of hot days that reach over 90 degrees. According to researchers from the University of Wisconsin, this is just one consequence of human-driven climate change.

Currently, 97% of scientists studying climate agree that climate change is caused by humans. The new study, which is published in JAMA, lays out what these wide ranging effects on public health are.