The Park fire in Butte County — already the largest blaze in California this year — exploded to more than 164,000 acres by Friday morning, with its rapid spread forcing more evacuation warnings.

The growth of the fire over two days amid steady winds and hot temperatures has been dramatic, with its remote location making it difficult to fight. It was listed at 164,286 acres Friday morning and 3% contained.

Conditions on the ground are going to continue to be a challenge, forecasters say.