Orange County significantly reduced its emergency evacuation zone after the risk of a chemical tank explosion was eliminated, allowing approximately 34,000 residents to return home after four days of evacuation.

President Trump approved California's request, declaring a federal state of emergency to mobilize resources to assist Orange County in responding to a chemical tank incident.

California announces toxic chemical tank explosion threat eliminated, but 50,000 evacuated residents remain displaced.

A crack in a California chemical tank may have helped reduce pressure and explosion risk, offering hope to 40,000 evacuated residents.