A heavy downpour caused flash floods in the northern Son La Province which swept away 30 houses and 10 locals, six of whom were found dead, with the remainder still missing. Many parts of the road to the centre of the Muong La District were under a metre of water, causing traffic congestion. The floods also destroyed property.
Heavy rain also made water levels on the rivers rise dangerously high. Son La authorities mobilised hundreds of officials, soldiers, police officers and locals to evacuate households living near rivers and streams.