The National Fire Danger Rating System is shown as “high” on a sign posted along State Route 159 at Red Rock National Conservation Area Friday, June 3, 2016, in Las Vegas. (Ronda Chu …

The National Fire Danger Rating System is shown as “high” on a sign posted along State Route 159 at Red Rock National Conservation Area Friday, June 3, 2016, in Las Vegas. (Ronda Churchill/Las Vegas Review-Journal)