However, national investment resources for climate change adaptation are limited. Meanwhile, the expenses for remedying damage caused by potential climate hazards are expected to increase significantly under the impact of climate change, sea level rise and saltwater intrusion. The cost of adaptation is estimated to exceed 3- 5% of GDP by 2030. Thus, it is necessary to diversify sources of investment in climate change adaptation from the public and private sectors, and from international support. Despite great effort and initiative in implementing climate change adaptation activities, the shortage of capacities and resources for climate change adaptation measures are major challenges for Viet Nam.