Tuvalu faces severe existential threats from climate change, primarily due to its low-lying geography where most land sits under two meters above sea level. Rising sea levels, intense king tides, coastal erosion, and saltwater contamination of soil and freshwater put the nation at risk of becoming largely uninhabitable in the coming decades. 
Major Environmental Impacts
- Rising Seas and Flooding: Sea levels around Tuvalu have risen faster than the global average. Porous coral atolls mean high tides push water up through the ground, flooding roads and yards even on clear days.
- Coastal Erosion: Stronger waves and storm surges eat away at the narrow coastlines, destroying property and reducing the total land area.
- Water and Food Scarcity: Saltwater seeps into underground freshwater lenses and ruins traditional farming pits used to grow crops like pulaka (swamp taro), creating heavy reliance on imported food and rainwater harvesting.
Social and Health Consequences
- Public Health Risks: Standing saltwater and periodic droughts damage sanitation systems, increasing rates of skin diseases, diarrhea, and respiratory infections.
- Displacement and Migration: Rising risks have prompted legal and migration pathways, such as the Falepili Union treaty with Australia, allowing targeted residency options for displaced citizens.
- Preservation of Statehood: International legal discussions emphasize that losing physical land to sea-level rise should not strip Tuvalu of its sovereign statehood or maritime rights, prompting digital archiving projects to map the nation.