Dangerous heat wave heading to California, Arizona and Las Vegas

In Las Vegas, Phoenix and Palm Springs temperatures could rise to 44 degrees.

A dangerous and potentially record-breaking heat wave is moving toward the West this week, affecting California, Arizona and Southern Nevada, including Las Vegas.

As of Tuesday, an extreme heat warning will be in effect for the California Valley region. Temperatures of up to 42 degrees Celsius are possible from Redding to Sacramento and Fresno to Bakersfield.

A heat warning is in effect on Wednesday from Las Vegas to the Lake Havasu City region in Arizona.

By Thursday or Friday, temperatures in Las Vegas, Phoenix and Palm Springs (California) are expected to rise to as much as 45 degrees Celsius.

If temperatures in Las Vegas rise above 101 degrees on Thursday, it will be the earliest June the city has ever been this hot.

And if temperatures in Phoenix exceed 43.4 degrees Celsius on Thursday, the city will break a daily record set in 2016.

Reno (Nevada) and Fresno (California) will also set daily records on Thursday.

This weather is considered a high heat risk; excessive exposure can cause heat cramps and heat exhaustion, which, if not treated, can lead to heat stroke.

Further north, temperatures could rise above 35 degrees in Salt Lake City and Boise, Idaho.

Click here to learn all about protecting yourself from heat.