The large floods that hit Southeast Asia are a natural phenomenon that often occurs, especially during the rainy season. This region, which includes countries such as Indonesia, Malaysia, Thailand and Vietnam, experiences heavy rainfall which can cause prolonged flooding. The social, economic and environmental impacts of this disaster are significant, requiring an effective response. The impact of flooding in Southeast Asia is very complex. In the social aspect, thousands of people were forced to flee their homes. Basic services such as education and health are often disrupted, with schools converted into shelters for refugees. In addition, public health is a major concern, given the increased risk of diseases such as dengue fever and leptospirosis due to standing water. The economy also suffered major losses due to flooding. The agricultural sector, which is the backbone of many countries in Southeast Asia, is particularly vulnerable to the impacts of flooding. Rice, vegetable and fruit crops are often damaged, affecting food security and farmers’ income. In addition, infrastructure such as roads, bridges and public buildings is threatened, increasing the recovery costs that must be borne by the government and society. From an environmental perspective, flooding causes damage to the ecosystem. Mud and pollution carried by flood waters can contaminate water sources, affecting local fauna and flora. There are also long-term impacts on biodiversity which combined with climate change are exacerbating the situation. The response to this massive flood involved multiple levels of government and non-governmental organizations. Mitigation strategies such as creating reservoirs or drainage channels are important options for reducing the risk of flooding in the future. The development of a technology-based early warning system is also being carried out to provide information more quickly to people at risk. Apart from infrastructure tactics, public education regarding disaster preparedness is also a focus. Evacuation training and simulations are carried out to equip residents with the necessary skills. Awareness campaigns about the importance of protecting the environment are also being held, in order to reduce the negative impacts of human activities that worsen flooding. Community involvement in the decision-making process for managing flood risk is also very important. Through this participation, more responsive and relevant policies can be created, in line with the needs and expectations of local communities. Cooperation between countries is also important; sharing information and resources to deal with floods can minimize risks and speed recovery. Given the various challenges faced, joint efforts between governments, civil society organizations and citizens are essential to deal with the impact of major floods in Southeast Asia. Success in managing this disaster will depend on the collaboration and commitment of all parties, creating a more resilient and sustainable system for the future.