Authorities say a North Texas wildfire continues to grow amid sweltering temperatures and dry conditions after burning at least 12 structures. The Texas A&M Forest Service says the Chalk Mountain Fire about 50 miles southwest of Fort Worth is the largest active Texas wildfire after growing by 2,000 acres Tuesday to 6,000 acres. Meantime, crews continue to fight a fire on Possum Kingdom Lake's western shore about 70 miles west of Fort Worth. The Forest Service says that fire has burned about 500 acres and at least five homes. Both fires are 10% contained. No injuries have been reported.

A transformer exploded at Hoover Dam, producing a thick cloud of black smoke and flames that quickly were extinguished. Authorities say no one was hurt in Tuesday's explosion and electricity continued to flow to the 8 million people in Arizona, Nevada and Southern California who rely on it. The U.S. Bureau of Reclamation says the fire ignited around 10 a.m. and was put out within 30 minutes. Hoover Dam is located on the Nevada-Arizona border about 25 miles southeast of Las Vegas. It's a popular tourist destination. Some visitors captured the fire and smoke on video and quickly shared it on social media.

CAMBRIDGE, England (AP) — From a usually-temperate Britain to Europe's blistering southern nations, people across the continent are trying to …

Federal investigators say evidence indicates that a helicopter that crashed in New Mexico after helping fight a wildfire over the weekend descended at a fast rate. Officials with the National Transportation Safety Board said Monday that the agency has completed its initial documentation of the deadly crash. It will likely take weeks for investigators to determine the cause. The helicopter was carrying three people with the Bernalillo County Sheriff's Office and a county firefighter when it went down Saturday evening while returning from its firefighting mission. County officials on Monday called the four men heroes and said the law enforcement community is broken-hearted over the loss.