The Oakland Fire Department tweeted that the outage was caused by a fire at a PG&E substation near 50th Avenue and Coliseum Way in East Oakland. The fire ignited around 1 p.m. and a spokesperson from the fire department said when firefighters arrived on scene, they found a "transformer actively burning inside the yard."
https://www.sfgate.com/bayarea/article/pge-power-outage-shutters-oakland-airport-17794140.php
WE NEED TO PROTECT OUR RESERVOIRS, POWER STATIONS, ETC.