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Air quality is expected to be unhealthy for sensitive individuals Tuesday in several valley areas, county health officials warned.
The region's air quality agency is forecasting the unhealthy air for those with heart and respiratory conditions in the Santa Clarita, Pomona, East San Gabriel and West San Fernando valleys.
Dr. Jonathan Fielding, Los Angeles County's health officer and public health director, advises people living or working in those areas who have heart disease, asthma or other respiratory disease to minimize outdoor activities.
Schools that have children with sensitive conditions, including heart disease, asthma or other chronic respiratory diseases, should not participate in physical education classes or outdoor physical activity and stay indoors as much as possible, he said.