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Research question: Coastal zones face significant environmental and socio-economic impacts that is already experiencing extreme events. Increased frequency of intense storms events and along with the rise in sea level, lo leads to more coastal flooding. It is extremely important to improve and create tools that allow stakeholders to access reliable science-based information to help them respond to the risks of climate change and sea level raise impacts and assess opportunities for adaptation in coastal areas. Methodology: The location for Brazil is the city of Santos, which is the main port of Brazil. The METROPOLE project is funded by BELMONT Forum. The hypothesis of the project is that risk knowledge is best understood as being co-produced by science and by the social, political and cultural context, engaging stakeholders and policymakers in participatory planning meetings to analyse the social and cultural factors that impact decision-making and regional adaptive capacity. The COastal Adaptation to Sea level rise Tool (COAST) is software that models flooding damage to assets from storm surge and sea level rise over time. It can calculate one-time damages from a single event in time; as well as cumulative damage from all possible storms over a given time period. It then is used to calculate the benefits and costs from various adaptation strategies to determine which strategy is the most fiscal economically efficient over time. A one hundred year storm surge is the height of water with a probability of 0.01. Findings: For Southeast Zone, the damages from storm surge increase greatly from an SLR of 18 cm to 45 cm, and even more for the 1.00 m. with SLR between 18 and 30 cm damages by 2050 are concentrated along the Ponta da Praia neighbourhood. By 2100, Between 30 cm and 1 m the damaged area extends along the coast extending the flooding and storm surges few blocks away from the coast. By 2100, for 1 m SLR, if action is not taken, several areas in Ponta da Praia would be lost due to permanent inundation by SLR. For the Northeast Zone, large areas with high tides due to SLR in the section along the main canal with SLR of 18 to 30 cm, covering a large region and a SLR of 1 m the area flooded can extend until the over most of the region. The estimated damages concentrate mainly along the canal and along the coastal line, with the damages more concentrated (building lost due to flood) mainly in the Sao Manoel region. The cumulative damages shows higher losses for the Southeast zone of Santos, with cumulative losses of $R 1.7 billion with a SLR of 1 m between 2010 and 2100, while the Northwest zone shows losses of $R 550 million. Significance for practical solutions: We show the results of the applications of COAST in Santos, assuming various sea level rise levels until 2100. The partnership with the municipal governments will facilitate the internalization of the results and the implementation of public policies and appropriate environmental legislation and allowing the municipals to better manage their coastal areas.