Editor’s note: This article was updated on Sept. 18 to include additional information.

While firefighters battle some of California’s worst wildfires in recent memory, rescuers and evacuation sites are coping with an influx of horses driven from their homes. And in the fire zone, veterinarians are working to help animals left behind when owners evacuated.

On Sept. 9 the Butte Wildfire broke out in Northern California’s Amador and Calaveras counties. Three days later on Sept. 12, the Valley Fire began to threatened homes, ranches, and vineyards in Lake, Napa, and Sonoma counties. Within hours of fires’ the onset, mandatory evacuations forced residents and their animals into shelters and holding centers, said Jaime Moore, spokesman for the California Department of Forestry and Fire Protection (CalFire).

By Sept. 15, 17 animals had been placed at the Amador County Fairgrounds and another 110 horses were evacuated to the fairgrounds in Calaveras County