City crews responded Wednesday night to a sewer overflow that resulted in 32,400 gallons of raw wastewater coming out of a manhole at 1015 N. School St.

Crews were able to recover 775 gallons with a Vactor truck, but about 31,625 gallons went into a storm drain that empties into Kapalama Canal and, eventually, Honolulu Harbor.

The overflow from a 36-inch pipe was discovered at 10:40 p.m. Wednesday, and stopped at 5:30 a.m. today, according to the city Department of Environmental Services.

The state Health Department has been notified, and warning signs were posted this morning. Due to an islandwide brown water advisory, water sampling has been waived. City crews have cleaned, disinfected and deodorized the affected area.

City officials remind residents not to drain rain water into the sewer system by opening clean outs and manholes, and to refrain from draining rain gutters into the system.