A specific kind of flooding known as "flash flooding" happens quickly after a precipitation event, usually within six hours.
It frequently occurs in areas near rivers or lakes and is brought on by heavy or excessive rainfall.
It can also occur in areas without any nearby bodies of water.
Both urban and rural areas can experience flash floods, as was the case in eastern Kentucky and St. Louis in late July 2022.
When more rainfall lands in an area than the ground can absorb,
or it falls in areas with a lot of impervious surfaces like concrete and asphalt that prevent the ground from absorbing the precipitation,
the water has few places to go and can rise very quickly.
If there has recently been rain, the soil may already be saturated and unable to take in any more water.
When the soil is too dry and hardened to absorb the precipitation after a drought, flooding can also happen.