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Sea Level Rise Simulator
Blend satellite imagery with terrain elevation and preview regions that fall below a custom sea-level threshold.
Sea Level Rise Map Guide
This interactive sea level rise simulator overlays a sea-level threshold you choose onto real terrain elevation and highlights every region that falls below it. Move the level up or down to preview how coastlines, river deltas, and low-lying cities change as the sea rises, on a flat 2D map or a 3D globe.
The blue overlay marks land lower than the selected sea level, read from an open global digital elevation model. It is an elevation visualization, not a hydrological flood model: it does not account for tides, storm surge, drainage, or land subsidence, so use it to understand exposure and scale rather than as a forecast.
It overlays a sea-level threshold you choose onto terrain elevation and highlights every area that sits below that level, so you can preview which coastlines and low-lying regions would be underwater at that height.
Global mean sea level has risen roughly 20 cm (about 8 inches) since 1900 and the rate is accelerating. Depending on future emissions, the IPCC projects roughly 0.3 to over 1 metre of rise by 2100, with several metres possible over later centuries if major ice sheets destabilize.
No. It is an elevation-based "bathtub" visualization that shades all land below the chosen level. It does not model tides, storm surge, waves, drainage, or land subsidence, so it is best used as an educational illustration of exposure rather than a flood forecast.
The map shades any location below the selected elevation, so closed basins that already lie below sea level — such as the Caspian Depression or Death Valley — light up even though no ocean water actually connects to them.
It renders an open global digital elevation model with MapLibre GL. The resolution is limited to roughly tens of metres per pixel, so narrow channels, sea walls, and small islands may be averaged and shown approximately.