LAFAYETTE (KRON) – Firefighters have been busy after overnight fireworks sparked several fires in the East Bay.
Fireworks are illegal in most East Bay cities but there is the potential for more fires.
Crews were out late battling a grass fire in Contra Costa County.
The Con Fire Department tweeted out photos of the them working the fire near East 3rd and Harbor Streets.
Con Fire says they responded to 37 fires just on the Fourth of July.
Officials say, at this time, five of those fires have been confirmed to be caused by fireworks.
Authorities continue to investigate but say the other 32 most likely started by fireworks as well.