From LOS Warmachine University
Rules Clarification : Fire (Edit)
- Moving into "Shallow water" standard terrain does not cause continuous fire to expire. It's magic fire.
- You can always use non-standard terrain if you agree with your opponent before the game starts, however.
- A weapon can inflict continuous fire without itself being a fire damage weapon (for example, the Helios's fists). In this case, the attack can hurt models with Immunity:Fire it just won't apply the continuous effect.
- In terms of which player's clock is running down during the Maintenance Phase: The active player will roll for expiration of all the continuous effects. Then the inactive player will roll for all the damages of the continuous effects. (Judge Ruling)