The Los Angeles County Department of Public Health has extended the smoke advisory warning for LA County until at least 5 p.m. Friday. People are advised to avoid going outside unnecessarily and avoid physical activity, according to the statement.

“Predicting where ash or soot from a fire will travel, or how winds will impact air quality, is difficult, so it’s important for everyone to stay aware of the air quality in your area, make plans, and take action to protect your health and your family’s health,” said Muntu Davis, health officer for LA County in the statement.

The department also advises people whose conditions worsen to seek medical advice.