West Roasts Under Deadly Heat Dome

Severe weather alerts were issued for approximately 40 million people across the western United States as a potent heat dome reached its apex on Sunday. This atmospheric phenomenon traps hot air, leading to unusually prolonged and intense warmth, described as "exceptionally rare" for mid-July in some areas.

The harshest impacts are being felt in the northern Plains, Rockies, and desert Southwest, but hazardous heat is expected to spread eastward and linger through the following weekend. Widespread highs between 105 and 115 degrees are forecast, potentially shattering numerous local temperature records.

The National Weather Service cautioned about the heightened risk of heat-related illnesses, including heat stroke, and an increased danger of wildfires. "Extremely hot daytime highs combined with potentially record-warm lows will result in increasing heat stress over the next several days due to limited relief," the service stated.

Cities like Billings, Montana, and Salt Lake City, Utah, are anticipating all-time high temperatures, with warnings in place for much of Montana and Utah. Bismarck and much of South Dakota are also experiencing dangerously hot conditions, with heat indices reaching 100 to 110 degrees and little relief expected overnight.