A state air pollution agency says the Tick Fire, which has burned more than 4,000 acres since Thursday in Santa Clarita, has caused the air to be unhealthy.
The South Coast Air Quality Management District released a smoke advisory to remain in affect through Friday.
Areas impacted by fire smoke include Northwest Coastal Los Angeles County, West San Fernando Valley, East San Fernando Valley, Santa Clarita Valley and San Gabriel Mountains.
Health officials warn that ash and soot from the fire can be harmful even in healthy people.
"If you can see smoke, soot, or ash, or you can smell smoke, pay attention to your immediate environment and take precautions to safeguard your health," Dr. Muntu Davis, a health officer for Los Angeles County, said in a statement. "These precautions are particularly important for children, older adults, and people with heart or lung diseases."
The Los Angeles County Department of Public Health advises that people stay indoors to minimize their exposure to wildfire smoke as a precaution.
They recommend to keep windows and doors closed and to not use fireplaces, candles or vacuums. The health department also said that going to public places with air conditioning like a library is a good alternative to keep cool and stay away from harmful air.
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