Fire crews continue containment efforts for the Ross fire almost a week after the wildfire spread through Palo Pinto and Jack counties.

Fire crews Sunday have expanded to all perimeters of the Ross fire to contain the flames, Boe Adler, regional operations chief with the forest service, said in a video posted on social media.

Firefighters along the southwest side of the blaze secured the fire east of State Highway 16 on Saturday night, Adler said. Firefighters will continue Sunday to extinguish the flames in the area.

Fire crews were unable to access certain parts of the wildfire with equipment earlier on, but are now hiking into the areas to secure edges of the flames, he said. Responders will also be fighting the fire from above, using aircraft to assist crews on the ground, he said.

The Ross fire started Monday in Palo Pinto County, about 100 miles west of Dallas. It spread rapidly due to extreme heat, dry vegetation and gusting winds in the region. Some of its smoke prompted the National Weather Service’s office in Fort Worth to issue an air quality alert.

No deaths or injuries have been reported.

According to numbers released by the forest service Saturday, the Ross fire destroyed 157 structures, 18 of which were homes. Another 140 structures were damaged. But firefighters were able to save 453 structures.