The March heat wave in the Southwest is 'virtually impossible' without human-induced climate change, according to a report by World Weather Attribution, an international group of scientists who study causes of extreme weather events. The report suggests that extreme weather extremes are becoming more frequent as Earth's warming builds, putting more people at risk. The study also suggests that human-caused climate change has increased temperatures above the average of 4.7 degrees C to 4.2 degrees F (2.2 F) and added between between 5 and 7.2 C to the temperatures felt felt by experts. The number and average cost of inflation-adjusted billion-dollar weather disasters in the last couple years in the US is twice as high as just 10 years ago and nearly four times higher than 30 years ago. The United States is breaking 77% more hot weather records now than in the 1970s and 19% more than the 2010s. The area of the U.S. being hit by extreme weather in the past five years has doubled from 20 years ago, and the cost of these disasters is also increasing. The heat wave is considered ultra-extreme, with temperatures reaching up to 30 degrees above normal and potentially dangerous levels.