The decision was made on Thursday morning during his tour to the northern province to inspect flood control work and the extent of demage caused by the typhoon.
He was accompanied by Minister of Transport Nguyen Van Thang, Minister of Health Dao Hong Lan, Minister of Natural Resources and Environment Do Duc Duy, among others.
The Government chief conveyed condolences of the Party and State leaders to families of victims of landslides and floods.
He underlined the need to implement emergency measures to ensure the safety of Thac Ba reservoir.
With the spirit "putting people's lives, safety and health first and foremost", he called for doubling efforts to seek for missing persons, provide treatment for injured people, and deliver relief to areas seriously affected by the typhoon.
Pham requested local authorities to accelerate cleanup and environmental sanitation efforts and ensure food, clean water, clothes, and medicine for local residents.
Yen Bai is among localities suffering heavy damage due to floods and landslides. In particular, it is home to Thac Ba reservoir, one of three largest man-made reservoirs in Viet Nam.
The death toll from typhoon Yagi and subsequent floods and landslides in the locality has risen to 40 and four people are still missing.
The typhoon also caused serious damages to houses, infrastructure, irrigation, health care, education, electricity, water, and communications systems.
Along with the effective allocation and use of VND20 billion (US$815,000) in temporary support from the Government, Yen Bai has allocated over VND46 billion (US$1.87 million) from the local budget to urgently support the forces and people to overcome the consequences of the typhoon.
Over 100,000 people have participated in relieving consequences of the typhoon, including military, police, militia, youth, women and other volunteer forces.
The province has evacuated and arranged temporary accommodation for nearly 13,000 households in dangerous areas, especially areas at risk of flooding and landslides while nearly 60,000 people living in submerged houses were supported to move to safe places./.