洪水。洪水是文莱威胁最大、经济损失最严重的灾害类型。其主要发生在10月至次年5月的雨季。在2014年，大洪水造成的巨大损失让当地政府重新考虑计划疏浚几条关键河道。每年洪水灾害造成的经济损失约3100万美元，占其社会支出的3%。
山体滑坡。文莱发生山体滑坡的风险很低，但也有人认为该国山体滑坡未被报道。对滑坡风险的关注不如洪水高。由于缺乏对山体滑坡的认识，文莱还举办了关于“山体滑坡风险的认识：原因、减缓和预防”培训，以增加公众认知。
森林火灾和空气污染。在文莱不会直接发生森林火灾，其主要受到周边地区发生森林火灾的影响。印尼加里曼丹省的森林火灾往往是造成文莱空气污染的主要原因，或许因为他们焚烧农作物。2015年的农作物焚烧季节焚烧了大量田地，引发了健康问题，并影响了作物生长。另外，自1980年以来偶尔的雾霾爆发也已影响到文莱。
flood. Flood is the most threatening and economic loss type of disaster in Brunei. It mainly occurs in the rainy season from October to May of the next year. In 2014, the huge losses caused by the flood made the local government reconsider planning to dredge several key rivers. The annual economic loss caused by flood disaster is about 31 million US dollars, accounting for 3% of its social expenditure.
Landslide. The risk of landslides in Brunei is very low, but some people believe that landslides in Brunei have not been reported. The attention to landslide risk is not as high as that of flood. Due to the lack of awareness of landslides, Brunei also held a training on "awareness of landslide risks: causes, mitigation and prevention" to increase public awareness.
Forest fires and air pollution. There will be no direct forest fire in Brunei, which is mainly affected by forest fires in surrounding areas. Forest fires in Indonesia's Kalimantan province are often the main cause of air pollution in Brunei, perhaps because they burn crops. During the crop burning season in 2015, a large number of fields were burned, causing health problems and affecting crop growth. In addition, the occasional outbreak of smog since 1980 has also affected Brunei.
