But just how big is that?
ABC 7 News took the current fire perimeter and laid it on a map of the Bay Area and the results were staggering.
If the Thomas Fire was burning in the East Bay it would have burned from Richmond all the way down through Oakland and Hayward to Fremont, then east to Dublin and Walnut Creek.
ABC 7 news also laid out what 420 square miles would look like not within the current fire perimeter:
- The area burned would include the entire city of San Francisco, everything east of I-280 on the Peninsula, and basically the entire city of San Jose.
- If the fire was burning in San Diego, the entire city would be wiped out from Del Mar down to the Mexican border
At last check the Thomas Fire is still only 50 percent contained. It's destroyed more than 1,000 structures and is responsible for the death of one firefighter.
Click here to see a list of California's Largest Wildfires