Drought creates opportunities for private firefighters working for insurance companies in California as well as for fund managers backing south Sudanese warlords who control local farmland. As droughts raise food prices globally, there is no more precious asset.

The deluge—the rising seas, surging rivers, and superstorms that will threaten island nations and coastal cities—has been our most distant concern, but after Hurricane Sandy and failure after failure to cut global carbon emissions, it is not so distant. For Dutch architects designing floating cities and American scientists patenting hurricane defenses, the race is on. For low-lying countries like Bangladesh, the coming deluge presents an existential threat.

Funk visits the front lines of the melt, the drought, and the deluge to make a human accounting of the booming business of global warming. By letting climate change continue unchecked, we are choosing to adapt to a warming world. Containing the resulting surge will be big business; some will benefit, but much of the planet will suffer. McKenzie Funk has investigated both sides, and what he has found will shock us all.

To understand how the world is preparing to warm, Windfall follows the money.