Firefighters extinguished a fire at the Mercy North Auburn at Rock Creek complex on Sunday night.

CAL FIRE/Placer County firefighters responded to the multifamily structure on First Street before 9 p.m. According to CAL FIRE, first arriving personnel reported smoke showing from the third floor of the three-story complex.

Placer County Sheriff’s deputies evacuated 10 adjacent apartments on both sides of the fire. CAL FIRE reported the affected unit was fully charged with smoke, with a fire in the back corner and an active fire sprinkler.

“The modern building construction and sprinkler systems held the fire in check for the short time prior to firefighters extinguishing the fire,” CAL FIRE reported on its Facebook on Monday afternoon.

CAL FIRE confirmed the fire was extinguished 10 minutes after dispatch and three apartments sustained major fire and water damage. CAL FIRE also replaced the sprinkler and recharged the system.

There were no injuries due to the fire. The cause remains under investigation.

Mercy North Auburn at Rock Creek is a community of 79 homes for low-income and special-needs families. Located on 3 acres of county-owned property on First Street at the Placer County Government Center, Mercy North Auburn at Rock Creek includes 32 two-bedroom apartments, 25 three-bedroom apartments and 22 one-bedroom apartments.

Residents began moving in Jan. 24, 2022, and a ceremony was held in mid May 2022, which included a ribbon cutting and speeches with several area officials attending.

Doug Shoemaker, president of Mercy Housing California, said that day all 79 homes were occupied by working people and about 20 others who were homeless at one time. They were to pay 30 percent of their income toward rent. A few residents stood outside their new homes watching the ceremony.

A fire broke out at the Hope Center in downtown Berkeley when a lithium-ion battery overheated Monday night, authorities report.

Battalion Chief Brian Harryman of the Berkeley Fire Department credited the Hope Center’s fire sprinkler system with putting out the blaze before it spread.

“It probably saved the whole building,” he said.

The Hope Center, which opened in 2022 on the site of a former city parking lot, has 53 supportive housing units while Berkeley Way Apartments, part of the same complex, has 89 affordable units and services for low-income families.

Firefighters were dispatched to the Hope Center, at 2012 Berkeley Way, just before 8:30 p.m. Monday for a report of smoke on the third floor.

“We’re getting reports of somebody blowing up their room, unknown what that means,” a dispatcher told the Berkeley Fire Department as the call came in.

Thanks to proximity, Berkeley firefighters arrived at the Hope Center in under a minute, Harryman said: BFD’s Station 2 is just across the street about 100 feet away.

Inside the apartment, firefighters found scooters and lithium-ion batteries that had been charging unattended.

The fire was out quickly thanks to the sprinkler system, but the water caused “considerable damage” to the apartment where the batteries were charging.

Several adjacent units saw minimal damage due to water that got in beneath the doors.

Firefighters had to manually turn off the sprinklers to control the flow.

“There’s a considerable amount of water damage,” a firefighter said over the radio just before 8:40 p.m., adding: “We’re going to need squeegees and manpower.”

All of the residents were able to return to their rooms aside from the unit where the fire happened.

Fortunately, Harryman said, a friend in the building offered that resident a place to stay.

“We checked around and all the shelters were full. All the hotels were full,” he said. “We really didn’t have a place to send him.”

Harryman noted that some of the scooter rental companies pay people to charge lithium-ion batteries for them. But he said he did not know if that had been the case on Berkeley Way.

BFD strongly discourages anyone from charging lithium-ion batteries inside their homes, he added. Even outside, they should not be left unattended.

“Don’t plug them in and leave for the day or leave them for the weekend,” he said. “These things are overcharging, heating up and causing fires. If you are going to charge it, remain home with it and don’t charge it inside.”

Last year, the city of Berkeley announced in June that six recent fires had been caused by unattended lithium battery charging.

“These local battery fires — involving e-skateboards, e-scooters, and at least one e-bike — have also been seen around the region and nation,” the city wrote.

The city also noted that fires could “occur spontaneously while charging” and advised anyone noticing signs of fire, such as smoke, gas and sparks, to evacuate the area and immediately call 911.

Lithium battery safety tips from the city of Berkeley:

• Only use the original manufacturers’ chargers, batteries and replacements
• Charge only until the battery is full, then disconnect
• Keep the battery away from heat, cold and flammable items while charging and storing
• Discard distressed batteries (those that are swollen, dented or otherwise damaged) at a drop-off site — not in your garbage can

Learn more from the city of Berkeley about fire risks related to lithium-ion batteries.