A powerful storm fueled by a strong atmospheric river is sweeping across California, creating what forecasters are calling a dangerous and potentially life-threatening situation, especially in Southern California.Meteorologists warn that widespread flash flooding and debris flows are expected, particularly in areas near recent wildfire burn scars. Parts of Los Angeles, Ventura, San Bernardino, Santa Barbara, and Orange counties are under evacuation warnings or orders as heavy rain moves through the region.Some mountain areas in Ventura County have already recorded more than six inches of rain, with rainfall rates exceeding one inch per hour at times. That intensity is enough to trigger flash flooding and fast-moving debris flows, especially on scorched ground that repels water rather than absorbing it.More than seven million people are under a rare high-risk flooding designation, which forecasters say is issued on fewer than four percent of days each year but is responsible for…..