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That Heat Dome? Yeah, It’s Climate Change

• https://www.nytimes.com/2021/06/29/opinion/heat-dome-climate-change.html

By Michael E. Mann and Susan Joy Hassol

Heat waves now occur three times as often as they did in the 1960s — on average at least six times a year in the United States in the 2010s. Record-breaking hot months are occurring five times more often than would be expected without global warming. And heat waves have become larger, affecting 25 percent more land area in the Northern Hemisphere than they did in 1980; including ocean areas, heat waves grew 50 percent.

These changes matter because extreme heat is the deadliest form of extreme weather in the United States, causing more deaths on average than hurricanes and floods combined over the past 30 years. Recent research projects that heat stress will triple in the Pacific Northwest by 2100 unless aggressive action is taken to reduce heat-trapping greenhouse gas emissions.

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