Tropical storm Wipha weakened after making landfall in northern Vietnam on Tuesday, with authorities on alert due to heavy rains that could cause flooding and mudslides, as the Philippines struggled with monsoon downpours that began last week.

Tropical Storm Wipha brought heavy rain and flooding to northern Vietnam, leaving one person dead and another missing, police said Wednesday.

Wipha was a tropical storm over Vietnam Tuesday afternoon China Standard Time, the Joint Typhoon Warning Center said in its latest advisory. The tropical storm had sustained wind speeds of 40 miles per hour.