The closure has been extended until March 19.
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RELATED: Yosemite National Park hit by worst weather damage in decades
Fire lines once used to protect communities are being erased to prevent a future natural disaster.
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Officials say some parts of the forest could remain closed until the summer.
RELATED: Mono winds destroy Oakhurst home, forcing out single mother and her twins
Mono winds destroy Oakhurst home, forcing out single mother and her twins