Dozens of fires are burning west of the Mississippi River . A burning ban is issued in California . - The U.S. Army Corps of Engineers begins construction on a dam at Lake Mead, Nevada. More than 800 firefighters and support personnel were working in Oregon and Nevada to corral the 436,600-acre Holloway Fire , the largest of the Western wildfires . An Idaho fire could force more evacuations .
Dozens of fires are burning west of the Mississippi River . A burning ban is issued in California . - The U.S. Army Corps of Engineers begins construction on a dam at Lake Mead, Nevada. An Idaho fire could force more evacuations .