Health officials issued a winter weather warning for Southern California mountains and valleys as an extremely cold storm is expected to hit Tuesday afternoon, bringing rain and snow.

The L.A. County Public Health Department issued the warning for the San Gabriel, San Fernando, Antelope and Santa Clarita valleys as well as the Mt. Wilson area.

“Children, the elderly and people with disabilities or special medical needs are especially vulnerable during such cold snaps. Extra precaution should be taken to ensure they don’t get too cold when they are outside,” Jeffrey Gunzenhauser, Los Angeles County’s interim health officer, said in a statement. “There are places where people can go to stay warm, such as shelters or other public facilities. We also want to remind people not to use stoves, barbecues or ovens to heat their homes due to the risk of carbon monoxide poisoning.”

The National Weather Service advised parade fans camping out along Colorado Boulevard to wear layers of clothing as temperatures are set to drop to 35 degrees throughout the region, increasing the possibility of snow for other parts of Los Angeles County.

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