Place pets in carriers ASAP, or as soon as you know you will be evacuating. (Otherwise, you may not be able to catch them. They sense your increased anxiety as the fire approaches.)
Assure your pets have collars with tags.
Pack fresh water, bowls, pet food, and leashes
Pack kitty litter tray for cats. (Travel litter trays are available at pet stores.)
Use a pheromone cat spray, such as ThunderEase, to calm anxious cats.
Prepare horses and large animals for transport. Consider moving them to a safe location before an evacuation is ordered.