FRESNO, Calif. (KFSN) -- The San Luis Reservoir and O'Neill Forebay in Merced County are back open Wednesday morning after closures due to a nearby fire.
However, the Department of Water Resources is warning the public to avoid contact with the water because of a harmful algae bloom.
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Exposure to the toxic blue-green algae can cause eye irritation, skin rashes, and vomiting, among other symptoms.
Pets can also be affected by algae.
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Swimming and other water sport activities are not considered safe right now, but boating is allowed.