CAUAYAN, Philippines (AP) -- Super Typhoon Megi became the strongest cyclone in years to buffet the Philippines on Monday, while flooding in Vietnam swept away a bus and left 20 people missing, including a girl pulled from her mother's grasp by the raging waters.

The huge storm striking the Philippines drowned at least one man and was expected to plunge later into China, where authorities evacuated 140,000 people from a coastal province.

The storm could head later in the week to Vietnam, where 27 deaths from flooding already have been reported in recent days, in addition to the bus passengers snatched by floodwaters Monday and feared dead.