Arson investigators were looking into a fire that destroyed 4 cars in the Bay Ho neighborhood Monday morning, according to the San Diego Fire Department. Fire crews arrived at Ariene Drive near Morena Boulevard at 4:30 a.m. Four cars were reportedly on fire and all were a total loss, according to San Diego fire. The flames were knocked down within about 20 minutes. All four vehicles were engulfed in flames when firefighters arrived, and several explosions were heard as the tires popped due to the heat.