From AP:
Hot, dry and windy conditions are fueling a fast-moving wildfire in Utah, forcing the governor to declare an emergency and restrict fireworks as critical weather across the West gives way to mounting concerns that anything could cause a spark. Firefighters are facing more challenges on the ground from what fire managers and experts call unprecedented conditions.
Air tankers and helicopters were grounded Friday as winds picked up on the Cottonwood Fire, the largest blaze currently burning in the U.S. Gusts were clocked at 45 miles per hour (72 km/h) and humidity levels were in the single digits, leaving crews with few options for slowing the flames, especially as they raced through the treetops.