 This is KNPR News. I'm Dave Becker. The National Weather Service has issued an excessive heat warning for the Las Vegas Valley. This one's pretty lengthy. It goes into effect Wednesday morning at 11 and will last until 11 Monday evening, July 8. The Weather Service expects high temperatures in that five-day period to range between 110 and 115 degrees. The Fourth of July and the day after have projected highs of 114, while Wednesday, Saturday and Sunday are expected to reach 113.