Why is storm No. 10 the first storm in Vietnam to be warned red?
Storm No. 10 is forecasted when landfall in our country will be strong level 12-13, level 16 jerk and it is the first storm of Vietnam to be warned of danger level 4 (red).Video: 5 levels to classify wind based wind
Storm is divided into 5 levels according to Saffir-Simpson scale, the highest level corresponds to the strongest storm.