Las Vegas could break a heat record as millions of people in the US endure scorching temperatures

Las Vegas could break its all-time high of 117 degrees on Sunday as millions across the US deal with a weeks-long heat wave.

The Las Vegas city government has asked residents and visitors to stay indoors between 9 a.m. and 6 p.m. during the weekend whenever possible.

An influx of elderly residents and dehydrated construction workers has reached the city’s emergency department in recent days as the city scorches in an increasing heat dome.

The National Weather Service has warned more than 90 million people about heat.

“We’ve been talking about this construction heat wave for a week and now the most intense period is coming,” the National Weather Service said Friday.

“Numerous record high temperatures are likely and air quality issues will be common in multiple parts of the US,” the agency said in a bulletin.

Adding: “Temperatures will reach levels that pose a health risk and potentially kill anyone without effective refrigeration and/or adequate hydration,” it said.

The sweltering heat is expected to intensify over the weekend for Nevada, Arizona and California, with desert temperatures expected to soar above 120 degrees in parts.

“Make no mistake: this heat is deadly, and being in it for long periods of time is deadly,” Dr. Matthew Levy of Johns Hopkins University School of Medicine told CNN.

Three separate wildfires had broken out in Riverside County, southeast of Los Angeles, on Friday afternoon, and hundreds of firefighters were still battling the blazes on Saturday.

The fires are all within 40 miles of each other and have resulted in nearly 1,000 households being ordered to evacuate.

No injuries have yet been reported, according to the California Department of Forestry and Fire Protection.

Death Valley National Park in California and Saguaro National Park in Arizona both issued warnings advising people not to hike after 10 a.m. local time.

Texas authorities in Big Bend National Park said, “These are extremely dangerous/deadly temperatures! Hikers should be OFF TRAILS by noon. Stay hydrated. Limit your exposure.’

It comes after a stepfather and one of his stepsons died last month while hiking in extreme heat in the park in Texas.

A 57-year-old woman also died while attempting to hike eight miles in Grand Canyon National Park during a 100-degree heat earlier in July.

Phoenix has also seen rising temperatures break records, marking Friday’s 15th consecutive day of 110 degrees or higher.

“This weekend will see some of the most severe and hot conditions we’ve ever seen,” David Hondula, chief of the city’s heat department, told NPR.

“I think it’s time for maximum community vigilance,” he added.

On the East Coast, Vermont is dealing with the effects of historic flooding, which has killed at least one man.

Another woman was killed in upstate New York when she was swept away by floodwaters in Fort Montgomery, a small Hudson River community about 70 miles north of New York City.

Storms dumped up to two months of rain in parts of the state this week in a matter of days.

Officials called this week’s flooding the state’s worst natural disaster since flooding in 1927.

In addition to roads, homes and businesses, farms were hit hard, with the flooding shortly after many growers endured a hard frost in May.

It is expected to “destroy much of our produce and feed,” Agriculture Secretary Anson Tebbetts said at a news conference.

Emergency management officials in Vermont rushed to help communities and National Guard troops have also been sent to help with the relief efforts.