Florida’s Big Cypress wildfire forces highway closures as drought fuels fast spread

Just after dawn on a recent Saturday, the four lanes of State Road 29 along the eastern edge of Big Cypress National Preserve were empty. Florida Highway Patrol troopers stood at barricades where the asphalt vanished into a gray-brown wall. The smell of burned grass and cypress hung in humid air. Somewhere beyond the zero-visibility haze, firefighters were deliberately setting more of the swamp on fire.

The operation was part of a high-stakes effort to corral the National Fire, a fast-moving wildfire that has turned a normally soggy landscape into one of the largest active fire scenes in the country.

Discovered Feb. 22 in the preserve’s East Fire District south of Interstate 75, the blaze exploded across tens of thousands of acres in less than a week. By Saturday night, officials reported the fire at about 35,000 acres with 27% containment, up from more than 30,000 acres and no containment the day before.

The growth, and the tactics to stop it, have forced repeated closures of Alligator Alley and other key highways and offered an early-season glimpse of how drought and a changing climate are reshaping wildfire risk in one of America’s wettest states.

Fire races through a parched preserve

The National Fire was first detected late on Sunday, Feb. 22, burning in remote interior lands roughly 25 miles east of Naples, south of I-75 and east of State Road 29 in Collier County. The cause remains under investigation.

Within 48 hours, driven by dry vegetation, low humidity and gusty winds, the fire ballooned from roughly 5,000 acres to tens of thousands. On Feb. 25, the National Park Service placed the fire at about 24,000 acres and reported 0% containment.

“Area weather and environmental conditions are contributing to the rapid spread and difficulty of suppressing the National Fire,” park officials said in one of a series of daily updates.

By the evening of Feb. 27, the fire footprint had grown to about 30,225 acres, still with no containment and 154 personnel assigned. Early suppression was led by Big Cypress’ own fire staff, but at 6 a.m. Feb. 26, command transferred to the Southern Area Gray Incident Management Team, a Type 2 interagency team typically called in for complex, multi-day incidents.

The strategy, authorities stressed, was full suppression.

“This is not being managed for resource benefit,” said incident commanders, as crews built firelines, used natural barriers and prepared for larger burnout operations. “The objective is to stop the spread of the National Fire and protect communities, infrastructure and natural resources.”

Historic drought and a frozen-then-dried fuel bed

Big Cypress National Preserve spans about 729,000 acres of cypress swamp, sawgrass prairie and pine islands north of Everglades National Park. Fire is a normal ecological process there, and the preserve runs one of the Park Service’s largest prescribed burning programs, often treating 60,000 acres a year.

This winter’s conditions, though, are anything but normal.

For the first time since federal drought tracking began in 2000, all of Florida is classified in some level of drought. Meteorologists describe it as the state’s worst dry spell in about 25 years, with a classic La Niña pattern steering rain away from the peninsula during what is typically the cooler, drier season.

In early February, an unusually strong cold outbreak brought a hard freeze to parts of South Florida, killing off grasses, shrubs and understory plants across Big Cypress.

“Persistent drought conditions and widespread frost-killed vegetation continue to create an unusually heavy and highly receptive fuel bed,” the Park Service said.

Managers also noted a “Stage 3 drought” in and around the preserve and repeated dry cold fronts that dropped humidity and fanned existing flames.

Those conditions allowed the fire to run across prairies and into cypress stands, while also burning into organic soils in places, generating days of dense, low-lying smoke.

Roads closed, communities on alert

The smoke has repeatedly shut or restricted traffic on three crucial corridors that slice through South Florida’s interior: I-75, State Road 29 and U.S. 41, the Tamiami Trail.

On the night of Feb. 25 into the morning of Feb. 26, portions of I-75—known as Alligator Alley—were closed for hours when smoke reduced visibility to near zero. Similar conditions prompted rolling closures and escorts on subsequent nights.

“Smoke may impact portions of I-75, SR-29, and US-41 especially during overnight and early morning hours,” park officials warned. “Motorists are advised to use caution and remain alert to changing conditions.”

Officials also raised the specter of “super fog,” a particularly dangerous mix of smoke and moisture that can suddenly collapse visibility to a few feet. The National Weather Service in Miami cautioned that “visibilities may drop to near zero at times making driving treacherous, especially along Alligator Alley where smoke and fog may combine.”

On the ground, troopers asked drivers to slow down, use headlights and be prepared for abrupt closures.

“We are expecting some potential smoke impacts along the roadways there,” said Riki Hoopes, a public information officer for the fire. “We urge drivers to please use caution when in the area and acknowledge that it may be slow, there may be periodic stops.”

To conduct a large, planned burnout on Feb. 28, authorities closed State Road 29 between I-75 and U.S. 41 for much of the day, later extending that shutdown into Sunday morning. The small community of Jerome, along the corridor, was placed under a voluntary evacuation, while nearby Copeland residents were told to remain ready to leave quickly if conditions worsened.

No homes or other structures had been reported lost as of the weekend, and there were no reported injuries. Fire crews installed structure protection around houses, private inholdings and other vulnerable sites ahead of the firing operation.

Fighting fire with fire

The turning point in the fire’s containment came not from dousing flames, but from adding more.

With the main fire spreading to the south and east, incident commanders opted for a strategic firing operation along State Road 29. Using drip torches on the ground and aerial ignition devices deployed from helicopters, crews ignited unburned vegetation between the highway corridor and the head of the fire.

The goal was to create a broad, blackened buffer where fuels had already been consumed, depriving the wildfire of the grasses and brush it needed to move closer to Jerome, Copeland and U.S. 41.

“These coordinated efforts required extraordinary planning, communication, and professionalism,” said Toby Stapleton, the incident commander trainee with the Southern Area Gray team. “Thanks to the strong partnerships across jurisdictions, today’s operations were conducted safely and effectively, helping to strengthen containment lines and protect local communities, infrastructure, and natural resources.”

By Saturday evening, officials estimated they had completed much of what had been planned as a multi-day burning effort. The fire’s acreage grew to about 35,034, but containment climbed to 27%, giving firefighters their first firm hold on a portion of the perimeter.

Resources on the scene included more than a dozen engines, water tenders, four helicopters and several single-engine air tankers. Federal tallies put suppression costs at more than $1 million and rising.

Ecology and politics in a drying swamp

Even as the focus stays on keeping flames away from roads and homes, the fire is burning across some of Florida’s most sensitive habitat.

Big Cypress is the largest contiguous stronghold for the endangered Florida panther and supports black bears, wading birds and a host of other species. Fire can benefit many of those animals over time by keeping prairies open and preventing dense woody growth. Under deep drought, however, flames can burn hotter and deeper into organic soils, damaging roots and altering how water moves across the landscape.

The preserve is also a product of political compromise. Established in 1974 as the nation’s first “national preserve,” it was designed to protect a critical part of the Everglades system while still allowing hunting, off-road vehicle use, private landholdings and some oil and gas development. The Miccosukee and Seminole tribes maintain traditional and contemporary ties to the land.

In recent years, construction of a large immigration detention complex inside the Big Cypress region—nicknamed “Alligator Alcatraz” by critics—has drawn scrutiny from environmental groups and tribal leaders concerned about habitat fragmentation and flood risk. Officials say the National Fire has not directly threatened the facility, which lies about 20 miles from the current fire area, but they have contingency evacuation plans.

The blaze is adding a new layer to debates over how and where to build infrastructure in a state facing both increasing flood risk and emerging wildfire hazards.

A warning sign for Florida’s fire future

By late February, state forestry officials had recorded more than 650 wildfires across Florida this year, many of them in the Panhandle and interior counties under burn bans. Wildland fire experts say events like the National Fire—large, intense burns in the heart of winter—may become more common in a warming climate, especially when La Niña patterns dry out the Southeast.

For now, crews in Big Cypress are focused on reinforcing containment lines, mopping up hot spots and watching for flare-ups along the blackened edge of the National Fire. Smaller, targeted firing operations may continue on the southern flanks as weather allows, and managers are watching forecasts for any sign of meaningful rain.

Residents, motorists and tourists will likely be living with smoke and intermittent closures for days.

Florida is better known for images of streets turned to rivers after hurricanes and king tides. This winter, another picture has emerged: a parched swamp, smoke hugging an interstate, and troopers waving drivers off a highway that disappears into a wall of fire-tinged fog. It is a reminder that in a state caught between rising seas and deepening droughts, even the places once assumed to be too wet to burn can burn fast—and big.