400728 19: Sun rays illuminate the desert February 7, 2002 north of Las Vegas, NV where the primary proposed rail route for transporting radioactive waste to the site of Yucca Mountain lies. Although the route would skirt around downtown Las Vegas, many residents dislike the idea of shipping 70,000 tons of nuclear waste over nearby highways and railroads. In January, the U.S. Department of Energy endorsed the Yucca Mountain plan. U.S. President George W. Bush could annouce his support for the plan as early as this week. (Photo by David McNew/Getty Images)
An excessive heat warning for Las Vegas and parts of northwestern Arizona has been extended until Thursday evening.
The National Weather Service says high temperatures in the Las Vegas area will range up to 110 degrees while Lake Havasu City, Arizona, may hit 115 degrees.
The Las Vegas fire department advises drinking plenty of water and says cooling stations are available in the metro area for those in need. Residents also are advised to keep an eye on children, pets and the elderly.