This year has seen thousands more fish wash up on the banks of U.S. waterways — 40,000 shovelnose sturgeon were found dead in Iowa last week — but this one is no mystery. Rivers in the Midwest, on account of the sweeping heat wave and continuing drought, are as hot as bathwater. Officials investigating the Iowa deaths tested the water and discovered it was a steamy 97 degrees.
Aside from being an eyesore (and, we assume, a fairly smelly one), the latest deaths are an economic blow for the area’s fishermen. Shovelnose sturgeon are valued for their eggs — which are sold as caviar — and the specimens in question are thought to have been worth up to $10 million. (Gavin Gibbons, a spokesman for the National Fisheries Institute, told the Associated Press that the dead fish likely won’t affect caviar supplies.)
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