A record-breaking heat wave swept across the central United States, shattering temperature records from the Northern Plains to the Rocky Mountains. Preliminary data from the U.S. National Weather Service showed that Salt Lake City, Utah, and Billings, Montana, both reached 43°C (109°F), marking the hottest temperatures ever recorded in the two cities.

The new records surpassed previous highs of 41.7°C (107°F) in Salt Lake City and 42.2°C (108°F) in Billings. Forecasters expect the extreme heat to continue through Tuesday, urging residents to stay hydrated and limit outdoor activities during peak daytime hours.

The scorching temperatures have also complicated efforts to contain major wildfires in Colorado and Utah, where hot and dry conditions continue to fuel fire activity. Just one week earlier, the eastern United States experienced another severe heat wave, with temperatures in New York and Philadelphia climbing to around 40°C (104°F).

Climate experts say global warming is making heat waves more frequent and more intense, largely due to greenhouse gas emissions from burning coal, oil, and natural gas. Europe has also experienced exceptional heat, with Western Europe recording its hottest June on record. According to the World Health Organization, the recent European heat wave has claimed more than 1,300 lives.