Based on worst-case scenarios for sea-level rise, cartographer Jeremy Linn imagined the future of three of America's major Western cities. He used topographic information to speculate on what an 80m – ≈262 ft –  rise would look like as well as coming up with new names for this new geography. While such an increase in sea levels won't occur in our lifetime, our grandchildren could one day live in cities like this (if drastic food shortages, violent conflict, drug-adapted 'superbugs,' drought, and extreme weather don't get them first...). Such a rise in sea level would require every ice sheet on the planet to melt.

In Linn's imaginings, Portland (pictured above) has become a veritable archipelago of islands dominated by the spine of what-is-now Northwest Portland.

Likewise, much of contemporary Seattle will be replaced by a network of waterways. Only the city's hills would remains as isolated islands.

Los Angeles-of-the-future is almost entirely inundated. To get from Baldwin Island (Hills) to Isla Palos Verdes would require a boat voyage over the Strait Outta Compton. Probably would take less time than the 405 to be honest...