LOS ANGELES — Six weeks after the most destructive wildfire in city history, Los Angeles Mayor Karen Bass ousted the city’s fire chief Friday amid a public rift over preparations for a potential fire and finger-pointing between the chief and City Hall over responsibility for the devastation.

Bass said in a statement she is removing Chief Kristin Crowley immediately.

“Bringing new leadership to the Fire Department is what our city needs,” Bass said in a statement.

“We know that 1,000 firefighters that could have been on duty on the morning the fires broke out were instead sent home on Chief Crowley’s watch,” Bass disclosed. She added that the chief refused a request to prepare an “after-action report” on the fires, which she called a necessary step in the investigation.

The Palisades Fire began during heavy winds Jan. 7, destroying or damaging nearly 8,000 homes, businesses and other structures and killing at least 12 people in the LA neighborhood. Another wind-whipped fire started the same day in suburban Altadena, a community to the east, killing at least 17 people and destroying or damaging more than 10,000 homes and other buildings.

Bass has been facing criticism for being in Africa as part of a presidential delegation on the day the fires started, even though weather reports had warned of dangerous fire conditions in the days before she left.