Excessive Heat Warnings remain in effect across southeastern California into western and southern Arizona, as highs are expected to easily climb over 110 degrees for the warned areas. Phoenix is expected to see high temperatures over 112 for at least the next seven days.
Phoenix is expected to have highs over 110 degrees all week. The high temperature on Monday was just one degree shy of tying a previous record.
With extreme heat comes health risks, including heat exhaustion and heat stroke.
Over the weekend, a hiker overheated on Camelback Mountain in the Phoenix area. The Phoenix Fire Department used a hoist operation to get the hiker off the mountain trail. She was later taken to the hospital in stable condition.
Late start to summer in the West
For many towns that are used to triple-digit heat, summer has had a late start.
Las Vegas and Sacramento on Friday just finally reached 100 degrees for the first time this year, each breaking streaks that extended at least 290 days. For Las Vegas, its 294-day streak was a record, while Sacramento's 293-day streak was its second-longest since 2000.
The triple-digit temperatures are here to stay in Las Vegas, with forecast highs above 100 through the week.
The heat will gradually abate as the week progresses, with highs in California dropping back into the 80s and 90s by the end of the week.
Summer temperatures move north
The FOX Forecast Center is tracking the warming trend on its move north by the Fourth of July holiday.
Parts of the Pacific Northwest will have highs at or above 90 degrees on Tuesday, including Salem and Pendleton in Oregon and Boise in Idaho.
Medford, Oregon, could see temperatures reach triple digits into Wednesday, with a slight cool down back into the lower 90s by this weekend.
Washington will also receive a dose of warmth, with highs climbing well into the 80s in Seattle and Spokane through Wednesday.