YARNELL, Ariz. — Gusty, hot winds blew an Arizona blaze out of control Sunday in a forest northwest of Phoenix, overtaking and killing 19 members of an elite fire crew in the deadliest wildfire involving firefighters in the U.S. for at least 30 years.

The “hot shot” firefighters were forced to deploy their emergency fire shelters — tentlike structures meant to shield firefighters from flames and heat — when they were caught near the central Arizona town of Yarnell, state forestry spokesman Art Morrison told The Associated Press.

Late Sunday, officials reported the fire had destroyed an estimated 200 homes.

The flames lit up the night sky in the forest above the town, and smoke from the blaze could be smelled for miles.

The fire started after a lightning strike Friday and spread to 2,000 acres Sunday amid triple-digit temperatures, low humidity and windy conditions. Officials ordered the evacuations of 50 homes in several communities, and later Sunday afternoon, the Yavapai County Sheriff’s Office expanded the order to include more residents in Yarnell, a town of about 700 residents about 85 miles northwest of Phoenix.

Prescott Fire Chief Dan Fraijo said that the 19 firefighters were a part of the city’s fire department.

“We grieve for the family. We grieve for the department. We grieve for the city,” he said at a news conference Sunday evening. “We’re devastated. We just lost 19 of the finest people you’ll ever meet.”

Hot shot crews are elite firefighters who often hike for miles into the wilderness with chain saws and backpacks filled with heavy gear to build lines of protection between people and fires. They remove brush, trees and anything that might burn in the direction of homes and cities.

The crew killed in the blaze had worked other wildfires in recent weeks in New Mexico and Arizona, Fraijo said.

“By the time they got there, it was moving very quickly,” Fraijo told the AP of Sunday’s fire.

He added the firefighters had to deploy the emergency shelters when “something drastic” occurred.

“One of the last fail-safe methods that a firefighter can do under those conditions is literally to dig as much as they can down and cover themselves with a protective — kinda looks like a foil type — fire-resistant material — with the desire, the hope at least, is that the fire will burn over the top of them and they can survive it,” Fraijo said.

“Under certain conditions there’s usually only sometimes a 50 percent chance that they survive,” he said. “It’s an extreme measure that’s taken under the absolute worst conditions.”

The National Fire Protection Association had previously listed the deadliest wildland fire involving firefighters as the 1994 Storm King Fire near Glenwood Springs, Colo., which killed 14 firefighters who were overtaken by a sudden explosion of flames.

In 2001, the Thirtymile Fire claimed the lives of Tom Craven of Ellensburg and Karen FitzPatrick, Jessica Johnson and Devin Weaver of Yakima. Those four also were forced to deploy fire shelters after that fire spread quickly and overtook the firefighters.

U.S. wildfire disasters date back more than two centuries and include tragedies like the 1949 Mann Gulch fire near Helena, Mont., that killed 13, or the Rattlesnake blaze four years later that claimed 15 firefighters in Southern California.

“This is as dark a day as I can remember,” Gov. Jan Brewer said in a statement. “It may be days or longer before an investigation reveals how this tragedy occurred, but the essence we already know in our hearts: fighting fires is dangerous work.”

Morrison said several homes in the community of Glenisle burned Sunday. He said no other injuries or deaths have been reported from that area.

About 200 firefighters are fighting the wildfire, which has also forced the closure of parts of state Route 89. An additional 130 firefighters and more water- and retardant-dropping helicopters and aircraft are on their way.

Federal help was also being called into to help, Arizona State Forestry Division spokesman Mike Reichling said. The Red Cross has opened two shelters in the area — at Yavapai College in Prescott and at the Wickenburg High School gym.

Prescott, which is more than 30 miles northeast of Yarnell, is one of the only cities in the United States that has a hot shot fire crew, Fraijo said. The unit was established in 2002, and the city also has 75 suppression team members.

U.S. Rep. Paul Gosar, whose district includes Yarnell, shot off a series of tweets Sunday night sending his condolences to those affected. He said his office will remain in contact with emergency responders and would offer help to those who needed it.

Other high profile Arizonans expressed their shock on Twitter, including former U.S. Rep. Gabrielle Giffords who called it “absolutely devastating news.” U.S. Sen. Jeff Flake, R-Ariz., tweeted that he was “sick with the news.”