Health concerns cited as heatwave hits western US

A record-busting heat spread across the U.S. Southwest and into parts of Utah, Montana and Wyoming on Tuesday as a dome of high pressure hovered over a large swath of the region.

Temperatures pushed into the triple digits this week and intensifying the risk for wildfires amid a long-running drought. People were warned to stay inside, drink plenty of water and not leave children or pets unattended in vehicles. The excessive heat stretched from southeast California across Arizona and Nevada and into New Mexico, where a high of 103 degrees Fahrenheit  on Monday. It was expected to hit near that Tuesday.