In the early morning of August 3, 2017, the two flash flood events occurred in Kim Noi and Nam Pam watersheds in Mu Cang Chai and Muong La districts, respectively. The analysis of rainfall data and field surveys shows that the severe events related to extreme local rainfall (>100 mm in 6 hours) accompanying with steep topography (>40% slope) and low vegetation cover. | Flash flood events in Mu Cang Chai and Muong La on august 3, 2017 - causes and prevention measures