The Bac Lieu Bird Garden is expected to face a high risk of fire due to prolonged hot weather in southern Bac Lieu Province.
Lack of fresh water and encroaching salt water have added to the situation.
The garden's management board assigned forest rangers to be on duty 24 hours per day to pump water into canals and to be sure fire-fighters and equipment were ready to fight any fires that might break out.
The 130-ha bird garden is a national-level natural reserve with the largest population of birds in the Cuu Long (Mekong) Delta.