Boston is closed for business. Buses, trains and taxis are not running. Residents have been urged to stay indoors and lock their doors. The city looks like a ghost town.

The above photo, of the usually packed Downtown Crossing, comes from WBUR's Steve Brown. We've trolled social media and various Boston-area webcams for more images of the silent Hub. (If you find more, leave them in the discussion below.)

By Twitter user @cr3dit:

By Madeline Conway:

By Molly Oehmichen:

By Antonio Regalado: