Augustus Doricko, founder and CEO of cloud-seeding startup Rainmaker, surveys the sky from a sunbaked hillside 5 miles from Utah’s Great Salt Lake. On this balmy Sunday afternoon in late September, the lake is calm, but its serenity belies a potentially catastrophic problem: The Great Salt Lake is shrinking—and is at risk of disappearing altogether.

At its peak 40 years ago, the lake covered 2,300 square miles; today, more than 800 square miles of lake bed are exposed. As more of the lake dries, scientists warn that dust storms made up of toxic heavy metals could plague the Salt Lake Valley, home to 1.2 million people, and beyond.

Rainmaker’s futuristic technology could solve the state’s water woes by harnessing nature. The startup flies drones into the troposphere, where they probe for

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