A major medical emergency has closed the San Francisco Civic Center BART station Monday morning, creating delays across the system, the agency said.BART issued an alert about the station closure just before 9 a.

SAN FRANCISCO — A possible collision between a BART train and a person on the tracks closed down BART’s Civic Center station on Tuesday morning, officials said. BART called the incident a “major medical emergency,” but spokesperson Jim Allison said only that a collision “may have occurred.” He confirmed that a person had been on the tracks.

Doctors explain how much you should be getting, and the major signs that your levels are off. Amtrak said the train was traveling from San Jose to Sacramento when it came into contact with the motorcycle.

North Bay Interior Valleys and San Francisco Bay Shoreline were placed under an updated dense fog advisory by the National Weather Service on Tuesday at 9:04 a.m. The advisory is in effect until

A dense fog advisory was issued by the NWS Sacramento CA on Tuesday at 4:55 a.m. in effect until 10 a.m. The advisory is for Central Sacramento Valley, Southern Sacramento Valley, Carquinez Strait and Delta and Northern San Joaquin Valley.

San Diego County Coastal Areas and Orange County Coast are under a dense fog advisory which was issued by the National Weather Service on Tuesday at 2:28 a.m. The advisory is in effect until 9 a.m.