 Two other cities in our region are becoming increasingly expensive to visit. Salt Lake City, ranked number 7, and Albuquerque, ranked number 10. For the Mountain West News Bureau, I'm Yvette Fernandez. An excessive heat warning for the Las Vegas Valley goes into effect tomorrow morning at 11 and lasts until 11 p.m. Monday, July 8. High temperatures between 110 and 115 degrees are expected. KNPR News.