LOS ANGELES (AP) — A potent atmospheric river that had swept across California, resulting in at least six fatalities, has mostly passed. However, residual thunderstorms continue to pose a threat of mudslides in parts of Los Angeles County, which were recently devastated by wildfires.

Flood warnings persisted into Sunday afternoon for Los Angeles, Ventura, and Santa Barbara counties. These regions faced the potential for isolated showers following the heavy rains of Friday and Saturday.

The National Weather Service noted on Sunday that “given the significant rainfall over the past few days, it won’t require much more to trigger further flooding or rockslide conditions.”

Meanwhile, authorities continued their search on Sunday for a 5-year-old girl who was pulled out to sea by 15-foot (4.6-meter) waves at a state beach in Monterey County on Friday. Tragically, the girl’s father, 39-year-old Yuji Hu from Calgary, Alberta, perished while attempting to rescue her, according to sheriff’s officials.

In a separate incident north of Sacramento in Sutter County, a 71-year-old man lost his life on Friday when his vehicle was swept away by floodwaters on a bridge, reported the California Highway Patrol.

Off the coast of San Diego, a wooden boat believed to have been ferrying migrants toward the U.S. from Mexico capsized in stormy seas, leaving at least four people dead and four hospitalized, the Coast Guard said Saturday.

The long plume of tropical moisture that formed over the Pacific Ocean began drenching the San Francisco Bay Area on Wednesday night and then unleashed widespread rain over Southern California on Friday and Saturday. More than 4 inches (10 centimeters) of rain fell over coastal Santa Barbara County as the storm approached Los Angeles. Parts of the Sierra Nevada received more than a foot of snow.

The weather service said scattered rain could continue through Tuesday in the southern part of the state. Another storm was expected to arrive on Thursday.