Photos: Frigid temps push some Standing Rock protesters out

Despite the dwindling numbers and frigid temperatures, work crews continue construction on shelving units for a storage shed at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball.

"I've been here long enough already," said Alan Winge of Red Cloud, NE as he packed up his tent at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. "It's getting cold," he added as many others left camp with the windchill dropping to -20.

A sign asking people to take donations back to their homes sits outside a tent at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many left as the windchill dipped to -20.

Edgar Topalovic from Stepanovicevo, Serbia, chops wood at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many demonstrators left as the windchill dipped to -20.

Rude Bear-Shirt from Wounded Knee, SD, waits for his ride at the Prairie Knights casino on Wednesday, Dec. 7, 2016 in Fort Yates. Bear-Shirt said he came to the Oceti Sakowin camp with a drum group who is now making their way to Washington D.C. to play there, "I am here to the end and this ain't the end."

Brandon Bird of Palmdale, CA passes the time on his phone under the bleachers at the Prairie Knights casino on Wednesday, Dec. 7, 2016 in Fort Yates. Temperatures in the negatives forced many out of camp and into shelter at the casino and other businesses since Tuesday.

Horse walk in a field near the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 by Cannon Ball. Frigid temperatures forced many demonstrators out of the camp and back home or into shelters around the area.

Tammy Flecksteiner, far left, of Ruidesi, NM, tells a joke to Kathi Carbone, center of Fallbrook, CA and Joe Slackie, bottom right of San Diego, CA as they wait for a ride at the Prairie Knights casino on Wednesday, Dec. 7, 2016 in Fort Yates. Temperatures in the negatives forced many into shelter at the casino and other buildings since Tuesday.

Wesley Burrier, left, of Las Vegas, shows Jacob Pene, right of San Diego, how to put on tire chains on Wednesday, Dec. 7, 2016 in Fort Yates. Temperatures in the negatives shut down many roads and forced people into shelters at the casino and other buildings since Tuesday.

Demonstrators pass the time as they wait for rides at the Prairie Knights casino on Wednesday, Dec. 7, 2016 in Fort Yates. Temperatures in the negatives forced many into shelter at the casino and other buildings since Tuesday.

Michael Vargo came down with a group of veterans over the weekend and within an hour slipped on the ice and broke his leg. He said he returned to camp and was carried around by a group of veterans. Here, he waits for a ride at the Prairie Knights casino on Wednesday, Dec. 7, 2016 in Fort Yates. Temperatures in the negatives forced many into shelter at the casino and other buildings since Tuesday.

David O'Neill from Connecticut, plays with twins Luca, bottom, and Kaeton McDonald, top, 5, as they pass the time waiting for rides at the Prairie Knights casino on Wednesday, Dec. 7, 2016 in Fort Yates. Temperatures in the negatives forced many into shelter at the casino and other buildings since Tuesday.

Demonstrators look through piles of donations as they brave the single digit temperatures at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many left as the windchill dipped to -20.

Demonstrators brave the single digit temperatures at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many left as the windchill dipped to -20.

Demonstrators brave the single digit temperatures at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many left as the windchill dipped to -20.

Gusts of wind up to 50 mph wrecked some campsites at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many demonstrators left as the windchill dipped to -20.

"I've been here long enough already," said Alan Winge of Red Cloud, NE as he packed up his tent at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. "It's getting cold," he added as many others left camp with the windchill dropping to -20.

Gusts of wind up to 50 mph wrecked some campsites at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many demonstrators left as the windchill dipped to -20.

Demonstrators brave the single digit temperatures at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many left as the windchill dipped to -20.

Demonstrators brave the single digit temperatures at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Many left as the windchill dipped to -20.

Despite the dwindling numbers and frigid temperatures, work crews continue construction on shelving units for a storage shed at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball.

Workers stoke a fire barrel inside a storage shed at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball.

Demonstrators shovel snow outside their tents at the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball. Others left as the windchill dipped to -20.

The blocked 1806 bridge north of the Oceti Sakowin Camp on Wednesday, Dec. 7, 2016 near Cannon Ball.