According to Catherine Horner, spokeswoman with the state Division of Emergency Management, the fires in Clark County have consumed more than 350,000 acres - or almost 60% of the county.
Three other people died in a separate fire to the south while trying to usher cattle away from flames Monday evening.
Monitoring is crucial because the ground is "extremely dry", and it was possible that sparks from a smoldering stump could re-ignite the fire, said John Lehman, the emergency manager in Comanche County, where 234 square miles has burned.
A grass fire in Logan County, Colorado, also wrecked havoc on Monday, burning an estimated 30,000 acres.
Additionally, the service is asking everyone to report any wildfires immediately through 911, avoid the vicinity of wildfires to allow firefighters faster access to fires and to heed all evacuation notices. The fire is about 50 percent contained with fire behavior reported as moderate to high.
Crews grappling with vexing wildfires that have charred hundreds of square miles of land in four states and killed six people soon may get a bit of a break: Winds are forecast to ease from the gusts that whipped the flames. Red Cross officials remain on standby at a shelter that has been used by some evacuees since fires broke out several days ago in Reno and Rice counties.
The blaze jumped over both roads and requiring three planes from the Forest Service to drop water and fire retardant material to help, according to Phillip Truitt, spokesman for the Forest Service.
Cuomo calls anti-Semitic attack in NY 'reprehensible'
He'll also host a New York State-Israel Economic Development working lunch with the mayor of Jerusalem, Nir Barkat. The visit comes after the toppling of Jewish headstones at cemeteries.
The Texas A&M Forest Service says there have been homes burned in Ochiltree County.
Another fire, the Lefors East Fire, has burned almost 100,000 in Gray County.
Thousands of people have evacuated their homes.
In southwest Florida, wildfires have burned at least 6,000 acres and the Florida Highway Patrol closed part of the I-75 highway, reported The Associated Press.
He told CNN that 125,000 acres were burning in his county alone.
In Oklahoma, a 63-year-old woman died of a heart attack while fighting wildfires alongside her husband in Harper County, according to Dale Spradlin, Director of the state's Department of Emergency Management. Four firefighters were injured while battling the blaze. At one corner in the mostly rural-looking area, fire hoses lay partially burned beside a fire hydrant. "The Northwest Oklahoma Complex Fire, as well as other fires around the state, are pushing resources to their limits, and the last thing we need is to have additional fires".