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But “looking into the research, they really slow fire down. It’s great to have them. … They kind of act as a shield.”

While the cooler weather is expected to continue to aid crews, it doesn’t portend a slow fire season, experts say.

A deeper and more persistent marine layer that lasts well into the spring and early summer can lead to more moisture in the soils and ground that can slow fire spread.

The goal is to slow fire spread and lessen its intensity so crews on the ground get a chance to directly attack it.

Fire officials noted that a history of prescribed burns in the Mariposa Grove, along with scars from recent burns, could slow fire spread and limit potential damage.