A low-pressure cold front sweeping through Southern California on Sunday night is bringing moderate to heavy rainfall, and those living in burn areas and at higher elevations could see treacherous weather conditions.
Around 10:22 p.m., the National Weather Service issued a flash flood warning for residents around the Colby fire burn area in Glendora and Azusa, noting that expected rainfall will likely trigger debris flows.
In January 2014, about 1,900 acres were scorched in the so-called Colby fire and since then, the exposed tract has been prone to debris flows during heavy rains.
The flash flood warning extends until 12:15 a.m. Monday. City...