Photo: Alameda County Fire Department

California Highway Patrol crews were busy Tuesday morning as they worked to clear wrecks from San Francisco and East Bay roadways.

An overturned vehicle temporarily shut down the westbound Interstate 80 connector to northbound Highway 101 in San Francisco, according to CHP.

The crash, first reported at 5:04 a.m., destroyed six sand barrels along the roadway. Crews were en route to the area to sweep up the sand, which could be a hazard for drivers in the area, authorities said.

As of 7:11 a.m. the connector had reopened.

Officers temporarily closed down all lanes of westbound Interstate 580 in the Altamont Pass after a semi-truck caught fire around 3:48 a.m., authorities said.

The fire was first reported on the right hand shoulder of the freeway, a mile east of the North Flynn Road off-ramp, according to CHP. The agency issued a severe traffic alert.

Alameda County Fire officials said the truck was carrying frozen food, salami and bacon. No one was injured in the crash.

CHP Dublin officers have reopened three lanes as of 7:39 a.m. The right lane remains closed as tow trucks clear the scene.

Gwendolyn Wu is a San Francisco Chronicle staff writer. Email: gwendolyn.wu@sfchronicle.com Twitter: @gwendolynawu