A heat wave is expected to affect parts of the Western US, bringing record-breaking temperatures. The high pressure system, known as a heat dome, will hold heat close to the ground from Arizona to Montana. This heat wave is forecast to be relatively short-lived, according to National Weather Service meteorologists.

Temperatures are expected to reach extreme highs, with Las Vegas predicted to reach 115 degrees Fahrenheit and Phoenix expected to reach 116 degrees Fahrenheit. Further details on the heat wave and its expected impact are available from the National Weather Service.