Containment indicates what percentage of the fire perimeter has been surrounded by a control line. In this case, it means that 50% of the wildfire is halted from spreading, while

The fire is has burned approximately 478 acres with a "dangerous rate of spread" through heavy brush, firefighters said.

The Lake fire broke out in Silverwood Lake State Recreation Area in San Bernardino County, burning more than 400 acres and prompting evacuations and road closures in the region.