According to the article “Mississippi Floods Quad Cities,” the flooding of the Mississippi River creates a challenge for the people living in the region. What do scientists monitor in order to predict when floods may occur?

Scientists monitor the amount of snow and rainfall in the region in order to predict when floods may occur. If the water levels rise above “safe” level, then it means that a flood is likely to happen and the authorities can inform the inhabitants of that place that there is danger incoming if the flood is likely to be a big one.