Heat Waves Are Moving Slower and Staying Longer, Study Finds

When heat waves swept , in many places the oppressive temperatures loitered for days or weeks at a time. As climate change warms the planet, heat waves are increasingly moving sluggishly and lasting longer, according to . Each decade between 1979 and 2020, the rate at which heat waves travel, pushed along by air circulation, slowed by about 5 miles per day, the study found. Heat waves also now last about four days longer on average. This really has strong impacts on public health, said Wei Zhang, a climate scientist at Utah State University and one of the authors of the study, which appeared in the journal Science Advances. The longer heat waves stick around in one place, the longer people are exposed to . As workers slow down during extreme heat, . Heat waves also dry out soil and vegetation, harming crops and raising the risk of wildfires. These changes to heat wave behavior have been more noticeable since the late 1990s, Dr. Zhang said. He attributes the changes in large part to human-caused climate change, but also in part to natural climate variability. The study is among the first to track how heat waves move through both space and time. Rachel White, an atmospheric scientist at the University of British Columbia who wasnt involved in the paper, said she had been waiting to see research like this. We are having trouble retrieving the article content. Please enable JavaScript in your browser settings. Thank you for your patience while we verify access. If you are in Reader mode please exit and your Times account, or for all of The Times. Thank you for your patience while we verify access. Already a subscriber? . Want all of The Times? .