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.

HANOI, Vietnam -- Vietnam braced for Typhoon Wipha on Monday as coastal provinces were placed on emergency alert and airlines canceled flights ahead of the storm’s expected landfall early Tuesday.

Typhoon Wipha slammed ashore along the southern Chinese coast Sunday evening, after drenching Hong Kong and Macau with heavy rain and whipping wind, the Guangdong meteorological service said.