Mass Casualty Bus vs. Chemical Tanker Crash on I-505 near Vacaville

Summary: A major traffic accident occurred on northbound Interstate 505, south of the Alamo (Aqua) Valley Parkway near Vacaville, Solano County, California. The incident involved an occupied bus and a chemical tanker, resulting in a hazardous material spill. Multiple victims were reported, with approximately 60 patients triaged (50 green/minor, 9 yellow/moderate, 1 red/critical, and later 1 black/deceased). Emergency response included fire, rescue, and EMS units, with mass decontamination and expanded MCI protocols activated. The area was secured, hazardous materials teams were requested, and local hospitals were notified. Road closures were enacted in the vicinity to ensure public safety.