I'm not sure if there is any connection or not, but in Lawrence on RTE 114 there is a major construction project that has been ongoing for several months at the site of the former Showcase Cinema. The site is right in the area.
I live in Methuen and at this time(1:20 AM) it is the 1st time in several hours that I cannot hear siren noise coming from Lawrence, North Andover and Andover. Several friends of mine who live in Lawrence had a difficult time evacuating the city last evening due to all the road closures in Lawrence. Also the Mthuen olice Dept made a reverse 911 call to inform the residents of Methuen that their wasn't any risk in Methuen.