Containment on the Palisades and Eaton fires grew overnight after winds that have plagued the region began to die down. But officials stressed that there is still much work to be done in the fire zones before residents can return.

All red flag warnings for critical fire danger expired by Thursday evening, bringing relief for firefighting work on two deadly blazes in Los Angeles County.

A new air quality alert has been issued for Los Angeles County until 7 p.m. local time "due to harmful particle pollution levels from windblown dust and ash." This pollution can embed deep into the lungs and cause health problems including heart disease symptoms,