Though the Lunar New Year began Feb. 1, its celebration comes Sunday to Cambridge with a small Harvard Square street fair and a car parade from Boston that will stop at City Hall. Both are free, public events.

There was as much sewage-contaminated water discharged into the Alewife Brook last year as in 1997, before the implementation of a $200 million plan to modernize the area’s antique combined sewer systems – but 2021 was the 16th wettest year ever on record, a Cambridge official notes.

James W. Swan, a recently tenured associate professor of chemical engineering at the Massachusetts Institute of Technology, died Nov. 5 after what the school describes as “a medical event.”

State health officials raised the risk of West Nile virus in Cambridge and 26 other communities on Friday to high from moderate. The Department of Public Health acted after reporting the first infection in an animal this year, diagnosed in an alpaca in Middlesex County.

Jose’s Mexican Restaurant management says the restaurant is closing at the end of August after more than 20 years on Sherman Street.

No human cases of West Nile virus have been reported so far this season in Massachusetts, but state health officials reported Thursday that a mosquito sample in Cambridge has tested positive for the virus.

Arlington police have arrested a homeless man on charges he assaulted a town officer during an altercation in Mugar Woods, just outside Cambridge. Police said the has outstanding warrants out of Cambridge District Court.

Arlington police arrested a 17-year-old from Cambridge on firearm and motor vehicle charges Tuesday after an attempted traffic stop.

Victoria Greer, former assistant superintendent of student services at Cambridge Public Schools from 2013 through 2017, is expected to return as interim superintendent after a School Committee vote Thursday.

The search for an interim superintendent of the Cambridge Public Schools has narrowed, with one of three candidates withdrawing from consideration.