PALO ALTO (CBS SF) — Power was restored to nearly 7,000 Palo Alto residents and hundreds more in Lafayette who were experiencing a power outages in sweltering heat, on Monday.

The outage was mostly affecting South Palo Alto from Matadero Avenue to San Antonio Road and Middlefield to Deer Creek roads.

READ MORE: 'We Just Want Him Back': French Bulldog Stolen at Gunpoint in Oakland

Catherine Elvert, spokeswoman for Palo Alto Utilities, said the outage stemmed from electrical equipment problems with a transformer at the Maybelle electrical substation.

READ MORE: Chaos, Panic After Shots Rang Out At High School Championship Football Game

Meantime, in Lafayette, about 700 customers were also without power Monday afternoon, according to PG&E. A power outage affected several traffic signals and an unknown number of East Bay utility customers.

Police said at 4 p.m. that PG&E was investigating the outage. Meanwhile they were asking drivers to be cautious in the downtown area, and to treat every intersection like a stop sign.

MORE NEWS: KPIX Reporters Remember Slain Security Guard Kevin Nishita; 'Just the Kindest Man'

© Copyright 2019 CBS Broadcasting Inc. and Bay City News Service. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.