You can track wildfire size and containment status on InciWeb, a US Forest Service aggregator from various Federal agency databases. They additionally provide a Google Earth feed of fire data. However, I think it's still somewhat incomplete, since it lists only 162,000 acres in 7 active incidents in California, while the media is variously reporting numbers as high as 600,000 acres in 12 fires.

The question is why we insist on calling this a "natural disaster". Fire is good (and necessary) for many natural ecosystems - it's just bad for humans. Additionally, we generally wouldn't think the fire was a problem if there weren't humans in the way. Pop quiz: How many active forest fires are there in Montana right now? (Answer: 16 listed in InciWeb.) How many acres do they cover? (Answer: 411,000.) In Montana, it's not a "natural disaster", it's just natural. And, guess what, it's natural in California, as well. But because humans have gone and put themselves in the way of a (very predictable) natural phenomenon, it becomes a human disaster.