Heat-related emergency room visits in the Pacific Northwest region surged at the end of June, when states including Oregon and Washington were gripped by a record-breaking heatwave, according to a new report (pdf) from the Centers for Disease Control and Prevention (CDC). As all-time temperature records were shattered in the Pacific Northwest, the mean daily number of heat-related emergency room visits during June 25–30 surged to 424, which is around 70 times higher than during the comparable period in 2019 when there was no heat advisory in effect, the CDC said. For the report, the CDC analyzed emergency room visits for hospitals in Alaska, Idaho, Oregon, and Washington, with the agency noting that the biggest impact of the heatwave was in Oregon and Washington. At the same time, during the June 28 peak of the heatwave, there were 1,038 heat-related visits to emergency rooms in the states analyzed, compared to just …