How does low relative humidity affect wildfire?

Low relative humidity significantly affects wildfire behavior by allowing fuels, such as vegetation and dead organic material, to lose moisture. When the humidity is low, these fuels become drier, making them more susceptible to ignition. This increased dryness enhances the combustibility of the materials, enabling them to ignite more easily and burn at a quicker pace. As a result, when a fire encounters these dry fuels, it can spread more rapidly and intensely, leading to a more severe wildfire event.

In contrast, higher humidity levels can help maintain moisture in fuels, resulting in slower ignition and reduced fire spread. Therefore, the relationship between low relative humidity and rapid fuel combustion is a critical factor in understanding wildfire dynamics and preparation strategies in fire-prone areas. Understanding this interplay is essential for effective wildfire mitigation efforts.