Geologists Dave Tucker (left) and Pete Stelling at the Mount Baker hot springs in Washington's Cascade Mountains. The springs are within the large tract of federal land that could soon be open for geothermal development. Ashley Ahearn/KUOW hide caption

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Purdue University students are testing new software that may track and warn about tornadoes, such as this one which struck Rochelle, Ill., in early April. Walker Ashley/AP hide caption

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A boat collects oil that leaked from the Deepwater Horizon wellhead in the Gulf of Mexico in April 2010 near New Orleans. Chris Graythen/Getty Images hide caption

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A tray of sardines in Costa Mesa, California, in this November 17, 2014 photo. Plummeting sardine populations force a complete ban on sardine fishing off the U.S. West Coast for more than a year. LUCY NICHOLSON/Reuters /Landov hide caption

itoggle caption LUCY NICHOLSON/Reuters /Landov

At the Pelican Hill golf resort in Newport Coast, Calif., water conservation is an obsession. Yuki Shimazu/Flickr hide caption

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Workers pick asparagus in early April at Del Bosque Farms in Firebaugh, Calif. This year, some farmers in the state will get water, others won't, based on when their land was first irrigated. David Paul Morris/Bloomberg/Getty Images hide caption

itoggle caption David Paul Morris/Bloomberg/Getty Images