At least two people have died in the wildfire, which has destroyed more than 600 homes and blackened about 45 square miles in and around Bastrop, a city near Austin, the state capital.
Texas Task Force 1, an elite search team that was sent to New York following the Sept. 11 terrorist attacks and to New Orleans in the aftermath of Hurricane Katrina, will be assisting in Bastrop.
The team has dogs that can help look for people trapped in debris, Chief Bob McKee told The Associated Press. "We also have human remains canines that would scent on deceased persons or animals," McKee said.
Crews finally got a reprieve Tuesday from winds pushed in by Tropical Storm Lee that whipped the blaze into an inferno over the weekend. Texas Forest Service spokeswoman April Saginor said the Bastrop fire was 30 percent contained early Wednesday, and that the lighter winds were assisting firefighters in their efforts.
"Even though the fuels are critically dry, the grass is dry and the relative humidity is still pretty low, they were able to take advantage of lower winds," Saginor said.
The blaze in Bastrop is the most catastrophic of the more than 180 fires that have erupted in the past week across Texas, marking one of the most devastating wildfire outbreaks in state history. The fires have destroyed more than 1,000 homes, caused four deaths and pulled the state's firefighting ranks to the limit.
Texas Gov. Rick Perry cut short a presidential campaign trip to South Carolina to deal with the crisis, and on Tuesday toured a blackened area near Bastrop.
"Pretty powerful visuals of individuals who lost everything," Perry said after the tour. "The magnitude of these losses are pretty stunning."
White House spokesman Jay Carney said the Obama administration has approved seven federal grants to help Texas with the latest wildfires.
About 1,200 firefighters battled the blazes, including crews from as far away as California and Oregon. Five heavy tanker planes, some from the federal government, and three aircraft capable of scooping 1,500 gallons (5,600 liters) of lake water at a time also helped.
The disaster is blamed largely on Texas' yearlong drought, one of the most severe dry spells the state has ever seen. The fire in Bastrop County is the most devastating wildfire in Texas in more than a decade, eclipsing a blaze that destroyed 168 homes in North Texas in April.
At least 11 other fires exceeded 1,000 acres (400 hectares) Tuesday, including a 7,000-acre (2,800-hectare) blaze that has destroyed at least 60 homes and threatened hundreds more about 40 miles (65 kilometers) northwest of Houston. An 8,000-acre fire has destroyed at least six homes in Caldwell County, next to Bastrop County. In far northeast Texas' Cass County, a 7,000-acre (2,800-hectare) fire burned in heavy timberland.
Michael Graczyk reported from Houston. Also contributing to this story were Associated Press reporters Jamie Stengle, Danny Robbins and Schuyler Dixon in Dallas, Betsy Blaney in Lubbock, Will Weissert in Austin, Paul Weber in San Antonio, and AP Photographer Eric Gay in Bastrop.