What defines dry fuels?

Dry fuels are characterized by having low moisture content due to environmental factors such as temperature, humidity, and wind. When fuels are dry, they ignite more easily and burn more rapidly, which can significantly influence the behavior of a fire. This low moisture content can result from extended periods without precipitation, high temperatures, and low humidity, contributing to an increased risk of wildfire.

In contrast, well-hydrated fuels would possess a higher moisture content, making them less flammable and leading to slower burn rates. Fuels that contain high oils might indeed burn more intensely but are not necessarily low in moisture content. Freshly fallen fuels can be somewhat moist depending on the environmental conditions at the time of their fall, and they might not be classified as dry fuels. Understanding the condition of fuels in relation to their moisture content is vital for assessing fire risk and behavior.