OKLAHOMA CITY (AP) – Firefighters on Friday contained many of the wildfires that raced through Texas and Oklahoma and killed four people, but officials worried that forecasts for more warm, dry and windy weather could set the stage for additional blazes.

Oklahoma and much of Texas remained under burning bans, particularly for fireworks, because authorities believe the fires were mostly set by people ignoring fire bans and burning trash, shooting fireworks or throwing out cigarettes.

In southern Oklahoma’s Bryan County, a grass fire that has scorched nearly 10,000 acres and destroyed 10 homes near the small town of Achille broke containment lines Friday morning, but firefighters aided by a water-dropping helicopter were able to bring it back under control later, Achille Fire Chief Dean Collins said.

“It’s ridiculous how dry we are out here,” said Albert Ashwood, director of the Oklahoma Department of Emergency Management.

The blazes, which began Tuesday, spread quickly through the dry countryside, where temperatures were in the low 80s and wind gusts reached 40 mph.

Ashwood said officials were worried about high winds expected to rake the state Sunday and again on Tuesday. Combined with low humidity, “that’s a recipe for disaster,” he said.

Fire crews “have done an outstanding job working tirelessly and without sleep,” Bryan County Emergency Manager Tim Cooke said. “We’re trying to get it suppressed before Sunday, when humidities are supposed to be less than 20 percent and temperatures will be in the high 70s.”

In Texas, most rubble in the hard-hit community of Cross Plains was no longer smoldering Friday, but new blazes started in Palo Pinto and Lamar counties and along the Hood and Johnson county line, said Traci Weaver, a Texas Forest Service spokeswoman.

Those fires were contained Friday afternoon, but officials prepared for more possible blazes this weekend if the weather does not change, she said.

Patrick Burke, a meteorologist in Norman, Okla., said little if any rain was forecast for that state over the next seven days. Strong wind and higher-than-normal temperatures were expected, especially on Sunday, Tuesday and Wednesday.

Cross Plains, a working-class town there about 115 miles west of Fort Worth, lost about 90 homes and several other buildings Tuesday. Two deaths were reported there, and another was in Cooke County, near the Texas-Oklahoma line. In Oklahoma, a man was killed in a blaze in Hughes County.