When humidity levels are low, which means there is less water vapour in the air, fuels will be drier and will ignite faster. Fire Seasons Wildfire seasons vary according to location. May. Most fires in the New England states occur in late fall. In Ontario and Eastern Canada, most wildfires occur between April and October. Surface fires spread with a flaming front and burn leaf litter, fallen branches and other fuels located at ground level.
Crown fires burn across tree tops which are also known as the canopy or crown.
They depend on strong winds and dry fuels which makes them the most intense and the hardest fires to control. The burning of the ground level fuels create convection currents which lift and move the flames across the crowns. Depending on how long or how intensely it burns, a wildfire will affect the environment above and below the surface of soil. In some cases,the amount of moisture and organic matter in the soil will determine how it will be affected by a fire.