According to the NYC Office of Emergency Management (OEM):

Notify NYC adds:

As part of a Community Emergency Response Team (CERT) training class, there will be a controlled fire outside 4 River Road on Roosevelt Island tonight from 6:30 PM to 9:00 PM. Expect to see FDNY and NYPD personnel in action. To learn more about CERT, visit http://www.NYC.gov/CERT.

More information

on Roosevelt Island CERT team from previous post.