National Weather Service United States Department of Commerce
Hazard Map Threat Levels Safety & Impact
Graphical Hazardous Weather Outlook
Fire Weather Threat

The "Fire Weather Hazard Map" depicts the local threat of potential wildfires for the specified area. It is largely based on the state of dryness of vegetation as assessed routinely by the Florida Forest Service combined with forecast surface relative humidity, and forecast 20-foot wind speed.

 

Fire Weather
Threat Level

Threat Level Descriptions

Extreme

"An Extreme Threat to Life and Property from Existing or Potential Wildfires Due to Weather and Fuel Conditions."

  • Fires start quickly, spread furiously, and burn intensely. All fires are potentially serious. Development into high intensity burning will usually be faster and occur from smaller fires than in the very high fire danger class. Every fire start has the potential to become large. Expect extreme, erratic behavior. No yard waste burning should take place in areas with extreme fire danger. Fire restrictions are generally in effect.

Very High

"A Very High Threat to Life and Property from Existing or Potential Wildfires Due to Weather and Fuel Conditions."

  • Fires start easily from all causes and immediately after ignition, spread rapidly and increase quickly in intensity. Additional spreading by embers is a constant danger. Fires burning in light fuels may quickly develop high intensity characteristics such as long-distance spreading by embers and fire whirlwinds when they burn in heavier fuels. Both suppression and mop-up will require an extended and very thorough effort. Yard waste burning is not recommended. Fire restrictions may be in effect.

High

"A High Threat to Life and Property from Existing or Potential Wildfires Due to Weather and Fuel Conditions."
  • All fine dead fuels ignite readily and fires start easily from most causes. Unattended brush and camp fires are likely to escape. Fires start rapidly and short-distance spreading by embers are common. Fires may become serious and their control difficult unless they are attacked successfully while small.

Moderate

"A Moderate Threat to Life and Property from Existing or Potential Wildfires Due to Weather and Fuel Conditions."
  • Fires can start from most accidental causes, but with the exception of lightning fires in some areas, the number of starts is generally low. Expect moderate flame length and rate of spread. Short-distance spreading by embers may occur, but it is not persistent. Fires are not likely to become serious and control is relatively easy.
Low
" A Low Threat to Life and Property from Existing or Potential Wildfires Due to Weather and Fuel Conditions ."
  • Fuels do not ignite readily from small embers although a more intense heat source, such as lightning, will likely start fires in fine loosely packed fuels. Weather and fuel conditions will lead to slow fire spread, low intensity and relatively eaasy control. There is little danger of spreading by embers. Controlled burning can usually be executed with reasonable safety.
Non-Threatening
" No Discernable Threat to Life and Property from Existing or Potential Wildfires Due to Weather and Fuel Conditions."
  • Weather and fuel conditions are considered non-threatening for sustained fire growth at this time.

These threats do not consider proximity of new or existing fires to urban areas or other economic assets. No assumptions are made on availability or proximity of fire suppression resources. Daily potential for human caused and natural ignition occurrences are not evaluated with this experimental product.