The Jerusalem Fire in Northern California's Lake County, which is burning six miles south of the Rocky Fire, more than doubled overnight to 12,000 acres, Cal Fire said.
By Tuesday morning, the fire, which had charred 5,000 the day before, was not contained. A total of 50 structures were threatened.
Cal Fire had issued several mandatory evacuations and road closures for much of the Jerusalem Valley east of Spruce Grove. (Click here for full list)
Until the Jerusalem Fire broke out over the weekend, it was the Rocky Fire that had taken most of the Cal Fire's attention. But as of Tuesday, Cal Fire said the Rocky Fire was 88 percent contained – after having burned 69,600 acres.