LA PUENTE (CBS) — A fire in an underground electrical vault sparked a manhole explosion Tuesday in La Puente, knocking out service to 3,200 Southern California Edison customers.

(credit: CBS)

READ MORE: Barrett Scores 28 As Knicks Beat Clippers 110-102

According to Inspector Don Kunitomi of the county fire department, there were multiple explosions at 1:38 p.m. at North Del Valle Avenue and East Amar Road.

Los Angeles County Fire officials briefly evacuated 30 homes north of East Amar Road as a precaution.

READ MORE: Thousands In La Verne Remain Without Power Following Powerful Wind Storm

County firefighters initially ordered the evacuations because “we didn’t understand why there were so many explosions,” county fire Capt. Mark Savage said.

By rerouting power lines, service was restored to all but 600 customers, according to Steve Conroy of Edison.

MORE NEWS: LA County Sees Drop In COVID-19 Hospitalizations, But Transmission Rate Remains High

(©2011 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Wire services contributed to this report.)