Historic flooding is submerging parts of the Midwest and Great Plains under inches of water. Nebraska, South Dakota, and Wisconsin—among America’s most valuable and productive farm states—have declared states of emergency. Parts of Iowa have been declared disaster areas.

By now, you’ve seen the photos. Vast fields covered in water, with grain silos and barns sticking up through the glassy surface. Warming temperatures melted hard-packed ice, and, in combination with recent rains, have caused a deluge that has overwhelmed rivers and levees and spread across the plains. The inundation is visible from outer space.

Nebraska has been hit hardest. The strongest, most intense waters have come from the failure of the 90-year-old Spencer Dam. After the “bomb cyclone” poured rain across the state, the failure of the dam ignited a flash flood that emptied into the Missouri River, and linked up with snowmelt from South Dakota and Iowa. Now, large swaths of the state are underwater. Three of the four deaths caused by the floods have been here. Hundreds more have left their homes.

Jane Fleming Kleeb, Chair of the state’s Democratic party, tweeted that the historic losses faced by Nebraska families “will impact food on your table.” Farmers have already suffered over $1 billion in corn and livestock losses, with additional economic losses expected. There are 79,000 miles of waterways in the state—and more rain is forecasted to be on the way.