A smoking generator has brought four departments to Plainfield Elementary School at 539 School Road.
School officials heard a "loud pop" at about 9:45 a.m., according to Northampton County scanner reports. Smoke was then seen coming from the middle of the roof.
The generator was shut down at 10:13 p.m., according to scanner chatter.
No injuries have been reported.
The is being assisted by departments from Wind Gap, and Pen Argyl. Forks Township's ladder truck was initially called, but was then canceled.