A tomato recall due to risk of salmonella contamination has been designated as Class I, the U.S. Food and Drug Administration's highest warning level, the agency said. The FDA marked the tomato recall affecting three states as Class I, meaning there is a risk of "serious adverse health consequences or death," on May 28.

Tomatoes from Williams Farms Repack LLC were recalled across three U.S. states due to potential contamination with Salmonella. Check your kitchen now.

The recall of tomatoes distributed in three southern states was upgraded to the most severe warning the agency issues.