Utah restricted fireworks and declared a state of emergency Friday ahead of July Fourth celebrations as the United States’ largest wildfire mushroomed in size. The National Weather Service issued a rare “Particularly Dangerous Situation” warning as dry, windy conditions provided fuel for more fires across the western U.S. The Cottonwood Fire in a sparsely populated area of southern Utah started Monday. It reached nearly 111 square miles (287 square kilometers) Friday and was uncontained, forestry officials said. One of six large wildfires burning in Utah, it severely damaged the Eagle Point ski resort in Beaver County, forcing mandatory evacuations.

Smoke from the fire has been pushing to the east and northeast, meaning the air quality at popular vacation spots like Zion and Bryce Canyon national parks — located far south of the flames — hasn’t been significantly affected beyond some haze in the Bryce area. Still, visitors to Bryce have posted videos on social media showing the giant plume in the distance.

The smoke could further be seen for hundreds of miles, all the way to Colorado, as authorities put roughly 1,300 residents in the towns of Marysvale, Junction and Circleville on notice that they should be prepared to leave if conditions worsen and the fire pushes further.