Reports of vast areas consumed by fire each year are common in many parts of the U.S., including Florida. But while the wind-driven blazes of a drought year require an emergency response, a prescribed burn is the work of the state managing its fire-dependent ecosystems.
Florida relies heavily on these controlled flames — often burning more acres intentionally than any other state — to clear out dead brush and make way for new growth. The Florida Department of Agriculture and Consumer Services describes these fires as being “used to reduce hazardous fuel buildups, thus providing increased protection to people, their homes and the forest.”
But to residents and visitors alike, seeing smoke rising over the pines can be alarming. How do we know if it’s a planned routine or a wildfire emergency?
What is a prescribed fire?
Much like a doctor’s prescription, a prescribed fire is only applied under a certain set of conditions to achieve a desired outcome safely. Before igniting, burn managers and other trained professionals create a detailed plan that dictates exact weather conditions (like humidity and wind direction), and moisture levels required.
These heavily monitored flames are used for the following reasons:
- Fuel reduction: As forests naturally accumulate dead leaves, pine needles and fallen branches on the ground, a lightning strike can cause the flames to burn incredibly hot and fast. Controlled fires intentionally burn off this debris under manageable conditions.
- Ecosystem management: A controlled fire can clear out thick underbrush in any Florida environment, so that sunlight can reach the forest floor, vital nutrients return to the soil and certain native plants may even release their seeds. It also opens up the landscape, making it easier for wildlife to navigate and forage for food.
Telling controlled burning and wildfires apart
A prescribed fire is usually kept at a low intensity, remaining closer to the ground to consume dead underbrush, pine needles and wiregrass without damaging mature trees. A wildfire, on the other hand, is driven by erratic winds and dry conditions, with its flames moving rapidly.
Another telltale sign is the smoke, with prescribed fires producing white or light gray smoke due to the relatively light material it clears out. Meanwhile wildfires burn substantially hotter and consume heavy fuels like live trees, which churns out dark gray or deep black smoke.
Of course, controlled burns are planned and heavily orchestrated, so you can expect to see Florida Forest Service (FFS) crews, park rangers or others on site. Sometimes agencies will even place bright warning signs on roads that read “Prescribed Burn Ahead” or “Smoke on Highway.”
