Crop insurers could face tough times as thunderstorms and flooding have left farms in Iowa and Illinois underwater, Bloomberg reported.

Among the most affected could be Wells Fargo & Co.’s Rural Community Insurance Services unit, which has received 6,000 loss notices from farmers because of flooding so far, triple the number it had received at this time last year, according to National Crop Insurance Services (NCIS). Rain & Hail LLC, an affiliate of Ace Ltd., said most of its policyholders will have a loss and Deere & Co.’s John Deere Risk Protection unit said it expects all of its policyholders in Southern Illinois to have a loss.

During the Floods of 1993, Iowa insurers lost nearly $5 for every $1 they made in premiums, according to NCIS. But in recent years, crop insurers have profited from record corn and soybean prices, which increased the amount farmers needed to pay to protect their produce. Last year, premiums paid to crop insurers soared 43 percent to $6.6 billion, according to the U.S. Department of Agriculture.

Crop insurance began in the 1930s to help farmers recover from the Great Depression. The federal government subsidizes it and sets rates based on commodity prices.