Read the full story in the Washington Post.
Nearly one-third of the global population suffers deadly levels of heat for at least 20 days during the year, new research suggests. And by the end of the century, thanks to climate change, this number could climb above 70 percent.
Certain parts of the world, the researchers note, will be harder hit than others. Tropical regions, where temperatures are already high for much of the year, will see many more days of deadly heat than other parts of the world. Under a business-as-usual climate scenario, they may face these conditions almost year-round by 2100.
The new study, published Monday in the journal Nature Climate Change, underscores the growing threat that rising temperatures pose to public health. The research focuses specifically on heat and humidity conditions known to increase the risk of human mortality — generally speaking, that’s when temperatures climb above 98.6 degrees Fahrenheit (the average human body temperature), but can also include cooler conditions with higher levels of humidity.