A massive fire destroyed a one-million-square-foot Medline warehouse in Tracy on Thursday, with no injuries reported. - The fire began on the roof and spread rapidly after the roof collapsed.
- A failure of the building's water supply system hampered initial firefighting efforts. - Over 200 firefighters and 100 support personnel responded; embers ignited nearby properties.
- Air quality agencies are monitoring smoke; the cause of the fire is under investigation.