The Bay Area has remained warm and dry this week, paving the way for some record-setting weather.

Several cities shattered heat records Monday, according to the National Weather Service, including San Francisco, San Jose, Livermore and Half Moon Bay.

San Francisco reached a high of 77 degrees, breaking a 2011 record of 73 degrees. San Jose had a high of 79 degrees to exceed a previous record of 75 degrees in 2011.

Livermore reached 78 degrees to break the 2011 record of 76 degrees, while Half Moon Bay hit 76 degrees and surpassed the 2011 record of 75 degrees.

Several accidents on Bay Area roadways Tuesday morning are causing traffic delays for the morning commute, authorities said.

A crash on Interstate 880 in Oakland caused northbound lanes to close for about an hour and snarled traffic during the morning commute, according to the California Highway Patrol.

Two vehicles collided at 5:22 a.m. in the middle lane on Interstate 880 near the 98th Avenue exit, CHP said. Northbound lanes were reportedly shut down as emergency crews and tow trucks cleared the debris. The lanes reopened by 6:08 a.m. and 30-minute delays were reported.

There was no immediate information on injuries.

A four car crash occurred about 5:15 a.m. on Highway 92 near the toll plaza in Redwood City and blocked two westbound lanes, CHP said. Tow trucks and the Hayward Fire Department reportedly arrived on scene to clear the roadway.

There was no estimated time for the lanes to reopen.

Sarah Ravani is a San Francisco Chronicle staff writer. Email: sravani@sfchronicle.com Twitter: @SarRavani