San Francisco Peninsula

In Silicon Valley are the headquarters of some of the largest tech companies in the world, such as Google, Yahoo, Facebook, and Apple.

Since 2010, droughts and wildfires have increased in frequency and become less seasonal and more year-round, further straining the region's water security.

[3][4][5] Along the center line of the Peninsula is the northern half of the Santa Cruz Mountains, formed by the action of plate tectonics along the San Andreas Fault.

Just north of the Crystal Springs reservoir is San Andreas Lake, after which the geologic fault was originally named.

[6] The east side of the peninsula is a densely populated and largely urban and suburban area that includes portions of Silicon Valley.

Caltrain is the primary passenger rail transit in the peninsula, serving much of the eastern urbanized areas of the peninsula between Mountain View (which also connects to VTA light rail) and San Francisco's 4th and King Street station.

[9] Oakland International Airport, located in the East Bay, is the smallest of the three and is also accessible directly via BART.