The National Centre for Hydro-Meteorological Forecasting said an unpredictable and complicated storm season is coming, bringing heavy rains to HCM City and Hanoi.
In Hanoi, 21 areas are prone to floods with more than 100mm of rain expected this summer.
The city is putting the finishing touches to its drainage system, including dredging lakes and drainage canals and upgrading equipment to avoid flooding.
More than 50 lakes have been dredged and 93 stormwater drains repaired.
In the central region, which is prone to floods and storms, further preparations, including large amounts of food and necessities for emergencies, plus shelter and rescue equipment, have been carried out.
In Danang City, global positioning systems have been installed on 121 fishing vessels. The city is able to mobilize over 2,400 soldiers and police and 97 canoes and boats for rescue work and to provide necessities at shelters if required, according Municipal authorities.
Last year, two floods struck in the city, killing five people, injuring seven and inundating over 17,000 households. The estimated loss was VND90 billion (US$4.2 million).
The southern province of Dong Nai has defined about 250 landslide-prone spots and found 248 safe places in case of evacuation. It has requested Long Khanh District and Bien Hoa City to make regular checks of riverside areas and dredge obstacles to ensure optimum flow.
In southern Tien Giang province, priority has been given to protecting agriculture crops in flood-prone areas of Cai Lay, Cai Be, Chau Thanh and Tan Phuoc.
Downgraded dykes along the Red and Day rivers are the main problems in northern Ha Nam province. In the 360km dyke system, many parts, up to 10km, needed to be rebuilt or upgraded.
Local authorities have been ordered to strengthen inspections and deal with violations along dykes and rivers and quickly improve facilities to get ready for the storm season.
In Ninh Binh province which has 460km of dykes and 44 reservoirs, people will be assigned to be on duty around the clock between May 5 and November 30, including police, soldiers and civilians, according to local authorities.
In up-north Son La province, the local Flood Prevention and Search and Rescue Committee has examined more than 30 hydro-power projects, sped up dyke construction and maintenance and listed 561 households living in dangerous areas.