Since walkers are not killed by fire, you may run into Burning Walkers that are marked by a flame icon.
Every time your survivors are in melee contact with burning walkers, they take burn damage. You can avoid burn damage by using ranged classes (hunter, shooter, assault) to attack.
Every time your survivors are in melee contact with burning walkers, they take burn damage. You can avoid burn damage by using ranged classes (hunter, shooter, assault) to attack.
Notice that with burning walkers struggles only last 1 turn, so save them quickly!