All lanes of King Street have been reopened after reports of smoke coming from a sewer opening.
The road was closed just before 9 p.m. Monday fronting Honolulu Hale.
City officials said HECO crews were investigating some type of underground electrical hazard.
HECO officials said there were no outages, although earlier in the night, outages were reported in the Aiea, Aliamanu, Foster Village and Salt Lake areas.
Power to all 1,700 customers has since been restored.
Authorities could not provide further details about the cause.
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