How Might a Scientist Investigate Annual Patterns of Fires?
ES0201  Relative Humidity

Relative humidity is a measure of how much water vapor is in the air. Fires start more easily in conditions of low humidity. High humidity works against a fire.

  !   Move your cursor over each site to see an enlarged view. Compare the color at each site with the legend to estimate the location's potential for wildfire.

USDA Forest Service, Wildland Fire Assessment System

Examine the values at each site and rate the risk of fire in each area from 1 to 5 based on relative humidity. Use a 1 to indicate low potential for a fire; use 5 to indicate a high potential for fire.

6. Record your fire potential rating for each site based on its relative humidity.

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