Update, 12:45 p.m.: Outage numbers now around 6,112 in Boston, with numerous outages in Hyde Park and Mattapan.
As of 9:30 a.m., Eversource reported more than 3,400 businesses and homes in Boston have lost power - including 1,600 or so in Roxbury, where falling tree limbs knocked out power at 6:32 a.m. and 1,400 in Jamaica Plain, where the power went off at 8:09 a.m.