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Wet grain from last fall is prompting concerns over storage safety. Over the last few weeks, there have been three accidents in the upper Midwest where workers have been trapped by grain resulting in two deaths. Submersion in grain occurs because the flowing grain acts like quicksand, pulling a person under within seconds. A grain bridge due to frozen or spoiled grain can collapse causing a person to fall and be buried alive. A third way workers are trapped is the collapse of a vertical grain wall when the grain breaks free and covers a person. Purdue University information shows over 75 percent of grain bin accidents occur when grain is being unloaded and nearly half of bin accidents occur with grain that is out of condition.