Wildfire

Lore & Background

In the harsh expanse of the RimWorlds, fire is both a necessary tool for forging and cooking, and an existential threat. The planet's volatile weather systems frequently generate massive electrical discharges that can ignite dry brush with terrifying speed. Once a wildfire begins, it acts as a living entity, consuming oxygen and fuel in a self-sustaining cycle that ignores colony borders or defensive walls. Historically, many fledgling settlements have fallen not to raiders or mechanoids, but to the silent creep of embers carried by the wind. The psychological toll is immense; watching one's life's work turn to ash creates a sense of helplessness that can shatter group cohesion. Survivors often recount the smell of burning timber as the last thing they remember before fleeing into the night.

Reader's Guide

Wildfires are triggered primarily by lightning strikes during thunderstorms or can be manually initiated by colonists using flammable items near vegetation. The event scales with map size and biome type, being significantly more frequent in hot, dry environments like deserts or scrublands. Once ignited, the fire spreads automatically to adjacent tiles containing grass, trees, or wooden structures. It deals damage over time to any unit caught within its radius and can completely destroy buildings if left unchecked.

The difficulty increases with larger maps where fire has more space to travel before reaching critical infrastructure. Colonists must prioritize extinguishing the blaze using water sources, foam generators, or by manually hacking out a firebreak. Failure to act results in massive morale debuffs due to the loss of resources and the trauma of near-death experiences. Effective prevention involves clearing dry brush around base perimeters and ensuring adequate water storage is available for emergency suppression.

Did You Know?

• Wildfires can spread through underground roots, igniting trees that appear far away from the original source.
• The event is one of the few disasters that can destroy a colony's food supply without any enemy involvement.
• Mechanoids are immune to fire damage, often walking calmly through burning forests while colonists flee in panic.