Since 1979, global heat waves are moving 20% more slowly — meaning more people stay hot longer — and they are happening 67% more often, according to a study in Friday's Science Advances. The study found the highest temperatures in the heat waves are warmer than 40 years ago and the area under a heat dome is larger. From 1979 to 1983, global heat waves would last eight days on average, but by 2016 to 2020 that was up to 12 days, the study said. Eurasia was especially hit harder with longer lasting heat waves, the study said. “Those heat waves are traveling slower and so slower so that basically means that ... there's a heat wave sitting there and those heat waves could stay longer in the region," Zhang said.

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Persons: Wei Zhang of, Gabriel Lau, ”, Lawrence, Michael Wehner, Zhang, Kathy Jacobs, Jennifer Francis, ” ___ Read, Seth Borenstein Organizations: Wei Zhang of Utah State University, Princeton University, North, Lawrence Berkeley, Lab, University of Arizona, Climate Research, Associated Press Locations: Eurasia, Africa, North America, Australia, AP.org