In addition to a cooling effect, the marine air can also help create more cloud cover, providing some shade and making heat waves more “manageable,” Mr. The overnight cooling came from what is known as a marine push, when a wave of ocean air replaces a hot air mass, lowers temperatures and raises humidity, according to the National Weather Service. When we don’t have those cooler overnight temperatures, that’s when things become really dangerous for a lot of folks out here.” “While that is slightly above normal, it allows people to open windows, clear out the hot air and cool down their homes overnight. “The much bigger thing for us is that low temperatures are dropping well into the 60s,” Mr. Matthew Cullen, a National Weather Service meteorologist in Seattle, said that Tuesday should be the last day of extreme heat in that city, with temperatures expected to hit 95 degrees, 20 degrees hotter than normal. Jeff Duchin, the health officer for Seattle and King County, Wash., said in a statement on Sunday. “The record-shattering extreme heat we’re experiencing is just the latest example of our climate crisis and how it’s impacting human health now,” Dr. Last year tied with 2016 as the hottest year on record, according to one analysis. It is all part of an overall warming trend: The seven warmest years in the history of accurate worldwide record-keeping have been the last seven years, and 19 of the 20 warmest years have occurred since 2000 worldwide, June 2019 was the hottest June ever recorded, and June 2020 essentially tied it. Also, the season for heat waves has stretched to be 45 days longer than it was in the 1960s, according to the report.
And the frequency of heat waves in the United States jumped from an average of two per year in the 1960s to six per year by the 2010s. The 2018 National Climate Assessment, a major scientific report issued by 13 federal agencies, notes that the number of hot days is increasing. While tying a single heat wave to climate change requires extensive attribution analysis, heat waves around the world are growing more frequent, longer lasting and more dangerous. “That said, it’s a heck of a lot better than being 30 to 40 degrees above normal,” Mr.
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