A roaring wildfire raced unchecked Monday through rain-starved farm and ranchland in central Texas, destroying nearly 500 homes during a rapid advance fanned in part by howling winds from the remnants of tropical storm Lee.

At least 5,000 people were forced from their homes in Bastrop County about 40 kilometres east of Austin, many of them fearing the worst while spending the night in emergency shelters. Huge clouds of smoke soared into the sky and hung over downtown Bastrop, a town of about 6,000 people along the Colorado River.

The blaze consumed as much as 10,000 hectares along a line that stretched for about 25 kilometres, Texas Forest Service officials said.

It destroyed 476 homes and about 250 firefighters were working around the clock, using bulldozers and pumper trucks against the fire, Bastrop County leader Ronnie McDonald said.

Mike Fischer, the county emergency management director, said the fire is "nowhere near controlled," and that a separate, smaller blaze south of the city is growing larger.

"I wasn't going to evacuate, but then the smoke got blacker and blacker and it was like: 'OK, time to go,"' said Gina Thurman, 47, an analyst for the Texas Workforce Commission.


Flames roar near Bastrop State Park as a wildfire burns out of control in central Texas Monday. (Mike Stone/Reuters)

"Waiting is the most frustrating thing," she said, choking back tears as she sat by herself in the shade on a curb outside Ascension Catholic Church, one of several shelter sites. "You're sitting there and you don't know anything but your house is probably burning."

Rick Blakely, 54, said when it finally would be time to return home, "I'm not expecting anything to be standing."

He was among about 30 people who slept on cots at the church.

"There was someone who asked how I was and it's a state of shock," he said. "I just don't know what I'm going to do."

The new outbreak led Gov. Rick Perry to return home to Texas, cutting short a visit to South Carolina where he was campaigning for the Republican nomination for president. He also cancelled a trip to California.

"The wildfire situation in Texas is severe and all necessary state resources are being made available to protect lives and property," Perry said.

Authorities mobilized ground and air forces to fight the largest of at least 63 fires that broke out in Texas since Sunday as high winds from what was then tropical storm Lee swept into Texas, which has endured its worst drought since the 1950s.

"It's still putting up a lot of smoke and it's scary," Jan Amen, a Texas Forest Service spokeswoman said.

School and school-related activities were cancelled for Tuesday.

There were no immediate reports of injuries.

2 killed Sunday

On Sunday, however, about 200 miles to the northeast in Gladewater, a 20-year-old woman and her 18-month-old daughter died when a fast-moving wildfire gutted their mobile home. That fire was out Monday, although several other major blazes continued to burn in at least four other counties in Central and North Texas.

At least two-thirds of the 2,400-hectare Bastrop State Park, a popular getaway just east of Bastrop, had been consumed, said Mike Cox, with the Texas Parks and Wildlife Department. All non-essential workers had been ordered out of the park.

"All I see is a wall of smoke," Cox said from the park's front gate. The park is home to several historic rock and stone buildings constructed in the 1930s and 1940s by the Civilian Conservation Corps.

"We're desperately trying to save them," Cox said. "The fire is getting closer and closer to that part of the park."

It's also home to the Houston toad, a 5- to 10-centimetre toad that's been on the endangered species list since 1970.

It was not immediately certain how the Bastrop blaze began but it appeared that two fires merged to form the "monster" fire, Amen said.

1,000 homes under mandatory evacuation order

To the west of Austin in Travis County, at least 20 homes were lost and 30 others were damaged in another fire. More than 1,000 homes were under mandatory evacuation and 25 lost in a third fire also in the Austin area.

Texas has experienced more than its share of destructive storms, including Hurricane Ike three years ago. The state, however, would have welcomed the rain that tropical storm Lee dumped on Gulf Coast states farther east.

Instead, Texas got Lee's winds, which combined with an advancing cold front to heighten the threat of blazes in a state where crews have responded to nearly 21,000 wildfires since the traditional fire season began early in the year.

All but three of the 254 counties in Texas are under outdoor burn bans.

The governor's office said at least 40 Texas Forest Service aircraft were involved in the firefighting Monday along with a half-dozen Texas military aircraft.