A massive fire continues to burn at a one-million-square-foot warehouse in California, prompting health warnings for residents due to deteriorating air quality. Firefighters have been battling the blaze since Saturday, working to contain the extensive damage. Authorities have cautioned individuals to limit outdoor activities and take precautions against exposure to smoke and potentially hazardous particles. The cause of the fire remains under investigation. The scale of the warehouse has complicated firefighting efforts, with concerns focused on the potential for widespread airborne toxins. Local officials are monitoring air quality levels and providing updates to the public regarding safety measures. The incident highlights the risks associated with large-scale industrial fires and their impact on public health.