A coastal hazard is anything that puts life or property at risk on the coastline, usually due to short and long term erosion, coastal flooding, high wind and waves, and storm urges. Luckily for Brazil, they only have to deal with coastal hazards in the east, since that is the only shoreline they have. And, for the most part they deal with soil erosion and coastal flooding the most in Brazil. Brazil is home to 8,500 kilometers of coastline, but mainly sees the coastal erosion on the northeast coast of Brazil.
The main causes of coastal erosion in Brazil are human activity and short and medium term natural causes (https://www.tandfonline.com/doi/abs/10.1080/00206819709465300). Northeast Brazil is also at risk of elevated sea levels, due to their low topography and its high ecological and touristic value (https://www.researchgate.net/publication/260494736_Coastal_risk_assessment_and_adaptation_of_the_impact_of_sealevel_rise_climate_change_and_hazards_A_RS_and_GIS_based_approach_in_Apodi-Mossoro_estuary_Northeast_Brazil). Due to this elevated sea level, soil erosion and coastal flooding are much more likely to occur.
I could not find anything on how Brazil is trying to slow this process done, and that is probably because you cannot really stop elevated sea levels, soil erosion, or coastal flooding. I saw that a lot of countries tried beach nourishment and sea walls to try and stop this from happening, and I think for Brazil this would be a good place to start. I also think that they should stop developing on the land that is eroding, such as stop putting houses or business or any kind of buildings on the land that is eroding, just to keep everyone safe. Since you cannot stop soil erosion, they can at least try to slow down the erosion with the sea walls and beach nourishment, and they can stop building on that land.