Temperature and weather change Similar to the majority of countries around the world, Fiji's temperature is rising as a result of climate change. The average maximum temperature of the country is rising at a rate of roughly 0.16 °C per year and has risen by almost 1.0 °C since 1950. Fiji's temperature is projected to continue to increase: under a high-emissions scenario, which assumes little to no change in
greenhouse gas emissions, temperatures could rise by 0.4 °C - 1.0 °C by 2030. Fiji's changing climate is causing higher rates of extreme weather, which
Prime Minister Frank Bainimarama stated is creating an "almost constant level of threat" in Fiji, which he argues is causing the nation to engage in a "fight for survival". 12
cyclones have hit Fiji since 2016, including
Cyclone Winston, a Category-5 tropical cyclone which impacted approximately 350,000 people and caused
FJ$2.98 billion in damages. Studies show that while the future frequency of tropical cyclones will be largely unaffected or may even decrease as a result of climate change, the intensity of tropical cyclones is likely to increase, posing a greater risk to vulnerable low-lying nations such as Fiji. While Fiji's rainfall is not currently projected to be directly affected by climate change, flooding often occurs from heavy rainfall and sea swells resulting from passing cyclones.
Sea level rise According to government estimates, Fiji's sea levels are rising at a rate of 4.6mm/year while
sea level rise is expected to reach 0.21 to 0.48 metres by the end of the 21st century. It is estimated that the compound effects of sea level rise and storm surge may result in high numbers of temporary relocation of the inhabitants of
Viti Levu, predominantly the northern and western parts. The effects of sea level rise are already being felt on Fiji's coastal communities - in 2014, the village of Vunidogoloa became the first community that was forced to relocate 2 kilometres to escape from coastal erosion, saltwater intrusion and flooding as a result of sea level rise. The number of coastal communities that will be forced to relocate will only increase in the future: the government of Fiji has identified 830 communities vulnerable to climate-related impacts - of these, 48 require urgent relocation.
Water resources Fiji has a high dependency on rainfall to secure fresh water and lacks the infrastructure to store and transport water, and as a result it is extremely vulnerable to drought. While Fiji's average rainfall is not expected to change in the future, the drought periods associated with
El Niño will become more intense, resulting in Fiji's
water security becoming more threatened in decades to come. Additionally, warming temperatures are expected to increase evaporation of freshwater, while rising sea levels and storm surges will pose an increasing threat of salinisation to freshwater resources, particularly groundwater.
Ecosystems and biodiversity Mangroves Fiji's
mangrove forests are of high ecological importance to the islands, as they provide protection from coastal erosion, create habitats for marine organisms and assist in reducing water sedimentation and pollution. Though data on mangrove abundance is quite dated, the most recent study calculated that Fiji's mangroves cover 517 km2, giving it the third largest mangrove area in the Pacific Islands after
Papua New Guinea and the
Solomon Islands. The loss of mangrove forests would have a significant impact on the Fijian marine environment, as many plant and animal species depend on mangroves for nursery grounds and habitats. Mangrove conservation is also important as the ecosystem has one of the highest rates of
carbon sequestration, so the reduction of Fiji's mangrove forests would release large amounts of stored and would greatly reduce the nation's emissions reduction capabilities.
Coral reefs There is thought to be over 10,000 km2 of
coral reefs in Fiji - these reefs are made up of a record 300 species of coral and are home to over 475 mollusc and 2,000 fish species. Climate change is posing a significant threat to reefs by elevating
sea surface temperature - corals are highly sensitive to temperature changes, which can cause
bleaching when severe. Additionally, the increasing concentration of in oceans as a result of climate change cause
ocean acidification which weakens coral skeletons, making them more vulnerable to
bioerosion, disease, bleaching and extreme weather events. As a result, an estimated 31% of Pacific coral reefs are at medium risk of degradation, while a further 10% are at high risk. ==Impacts on people==