CONCORD -- Fireworks apparently sparked a two-acre brush fire along the water canal near Bentley Street on Friday night.

The fire started about 9:30 p.m., with July 4 fireworks as the suspected cause, said Capt. Robert Marshall of the Contra Costa County Fire Protection District.

Marshall said six firefighters knocked down the blaze, however they were unable to douse the fire right away because more fireworks were still being shot off and landing in the area, which is near the Walnut Creek border, Marshall said Friday night.

Police were sent to quell the ongoing fireworks displays. Marshall said he did not believe any arrests were made.

"We had difficulty initially because individuals continued to (shoot off) fireworks when we got there and it reignited the fire in different places," Marshall said.

The Concord fire was not the only East Bay hotspot on the July 4 holiday. Marshall estimated that more than 30 small fires were put out overnight, including one sparked by fireworks in the 3500 block of Dimaggio Way in Antioch. That fire damaged a house and a car, Marshall said.

Marshall said the number of fires in his district was slightly down from previous July 4 holidays.

"In the big scheme of things we dodged a bullet, we probably were a little lucky," Marshall said. "With the drought conditions, I think more people were aware of the real consequences that can come from using illegal fireworks."

Contact Joyce Tsai at 925-847-2123. Follow her at Twitter.com/joycetsainews.