‘Killer Heat’ Days to Surge Without Climate Action: Report (1)

Blistering hot days in the U.S. could increase significantly as the Earth warms, threatening infrastructure, businesses, and public health—but the choices that governments make now could limit the severity, a new report says.

The July 16 report from the Union of Concerned Scientists, “Killer Heat in the United States: The Future of Dangerously Hot Days,” projects large and widespread spikes in high-heat days across the U.S. as climate change worsens.

If the U.S. takes little or no action to cut climate-warming greenhouse gas emissions, the country’s hottest weather could see up to a fourfold increase by mid-century, the study ...