Peninsula residents might be alarmed today by the smell of natural gas.
PG&E crews will be working on a gas line near Hillsborough to improve the gas supply before the winter months.
The work was scheduled to run from about 7 a.m. to 8 p.m. around Interstate 280 near Black Mountain Road.
Residents will likely smell gas and hear loud noises throughout the day but gas and electric service are not expected to be disrupted.