 The west, meanwhile, will remain scorching hot. High pressure will continue to provide the area with abundant sunshine and record-breaking heat. Las Vegas, Nevada crushed its all-time record high on Sunday, reaching 120 degrees. And afternoons for the rest of the week will break daily records for the city. The impacts from the heat will continue to be widespread through the northwest into the California valleys. And the eastern U.S. will have a heat of its own with some humidity. Highs will be mainly in the 90s.