Fire Rescue Chief
Public Safety Emergency Manager
1769 E. Moody Blvd. Bldg #3
Bunnell, Florida 32110
Non Emergency 24 Hour
Sheriff's 911 Center
The Fire Danger Is calculated by the State Division of Forestry and indicates the current threat of wildfires based on weather factors, such as wind, temperature, relative humidity and atmospheric stability. The range includes low, moderate, high, very high, and extreme.
KDBI - The Keetch-Byram drought index (KBDI) is a continuous reference scale for estimating the dryness of the soil and duff layers. The index increases for each day without rain (the amount of increase depends on the daily high temperature) and decreases when it rains. The scale ranges from 0 (no moisture deficit) to 800. The range of the index is determined by assuming that there is 8 inches of moisture in a saturated soil that is readily available to the vegetation.
For different soil types, the depth of soil required to hold 8 inches of moisture varies (loam=30", clay=25" and sand=80"). A prolonged drought (high KBDI) influences fire intensity largely because more fuel is available for combustion (i.e. fuels have a lower moisture content). In addition, the drying of organic material in the soil can lead to increased difficulty in fire suppression.
High values of the KBDI are an indication that conditions are favorable for the occurrence and spread of wildfires, but drought is not by itself a prerequisite for wildfires. Other weather factors, such as wind, temperature, relative humidity and atmospheric stability, play a major role in determining the actual fire danger.
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