>> Authorities say they're gaining ground on the so-called county fire burning west of Sacramento although some 1,500 homes are still under threat.
ousands of firefighters have been called in to battle the blaze, which has now burned some 86,000 acres of grass and brush.>> It's a little nerve wracking because grass fires move so fast.
Strong wind gusts, steep terrain and dry vegetation are making the fight even more challenging. And it's a similar story further east, where wildfires are also burning in Colorado. The spring fire has consumed almost 100,000 acres and destroyed more than 100 homes. That fire is just 5% contained.
So far this year, wildfires have destroyed some 2.5 million acres of land across the United States, more than the average of 2.3 million for the same time period over the past ten years. And with hot, dry conditions expected to persist, officials say that number is likely to rise.