Floods happen after or during heavy rainfall.
This excess of water can damage peoples'property,damage roads and even wash cars away.
Flooding can be very dangerous to people. Stranded and have no way of escape.
They have to be rescued from their rooftops or even from car roofs.
A severe weather warning helps prepare people for heavy rain and flooding.
People try to protect their properties using sandbags stacked up against their doors to prevent water coming into their homes.
Rivers can sometimes burst their banks so people living in low lying areas or near rivers are more at risk from flooding.
Often if heavy rain is forecast these areas are evacuated before the floods arrive.
Some scientists say that because of global warming britain will suffer more heavy rainfall and floods.