Flood often comes after heavy rains. It is usually applied to the overflow of a great body of water, as, for example, a river. But it can refer to any water that overflows an area.
Most common causes of flooding include heavy rainfall, long periods of rain, snowmelt, steep slopes, and more.
During heavy rain, the storm drains can become overwhelmed or plugged by debris and flood the roads and buildings.
Flooding is dangerous in a number of ways. We often think of flooding as just problem for the infrastructure and buildings.
But flooding brings a number of secret problems. For example, flood water is teeming with dangerous bacteria and contaminants. That can lead to sickness and disease.
The worst contamination of flooding usually comes by sewers or drains backing up in urban areas.
According to the World Health Organization, two billion people are infected Mycobacterium tuberculosis, or the bacteria that causes tuberculosis. That is almost one third of ...