A heat dome affecting the Southwest U.S. has caused record temperatures in March across 14 states, likely resulting in one of the most extensive heat waves in U.S. history, according to meteorologists. This heat wave is expected to last until at least mid-next week, with temperatures in areas like Flagstaff, Arizona, exceeding previous records for 11 to 12 consecutive days.
Meteorologist Greg Gallina indicated that the heat dome’s eastward movement will push temperatures in the southern and central Plains into the 90s Fahrenheit (mid 30s Celsius). A significant portion of the contiguous U.S. will likely break March temperature records.
While the scale of this heat wave may not match past historic events, its intensity is notable. Temperatures in some locations reached as high as 112 degrees Fahrenheit, setting new March records and coming close to all-time highs for April. Notably, climatologist Maximiliano Herrera noted that many states, as well as parts of Mexico, have reported unprecedented temperature increases.
The unusual weather pattern is influenced by a stagnant jet stream, with climate scientists attributing the increased likelihood of such record heat events to climate change. The heat dome is expected to dissipate by the end of next week, but significant impacts are anticipated in the interim.
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