Might not sound like it, but the fact that they're taking this seriously is good news. If there are cases in New Rochelle, probably large numbers of other commuters taking the New Haven line down into Manhattan have been exposed. We need to start practicing on what's coming, and right now, China's looking like the most successful model.
I truly can't believe how many people (including in my own hard hit country) praise the "Wuhan model" made by an authoritarian state. There are other successful models like the one in South Korea (after the disaster with that church, not before), which are far less authoritarian.
It's really true that vigilance needs to be kept up at all times, lest our freedom be taken away (and I don't mean not doing quarantine or lockdowns: I mean limitations of freedom "for your own good because you don't understand").