Floods Chapter 17 Sections 2 & 3 Pages Chapter 17 Sections 2 & 3 Pages

Floods Are the most dangerous weather-related events in the US. Floods occur when water pours into a stream or river that it overflows its banks and covers the land on either side.

Flash Floods A sudden, violent flood when water rises very rapidly. Unexpected floods are the most dangerous. It occurs within a few hours or even a few minutes of a storm.

Predicting Floods Advanced warnings can help reduce flood damage and loss of life. Weather satellites can supply information about snow cover, so scientists can estimate how much water will rush into the river when it melts. Scientists check river gauges that measure water levels.

Predicting Floods Forecasters can predict flood heights at different points on the river with the goal to help prepare people and evacuate. A flood watch- means that flooding is possible. A flood warning- means that flooding has been reported or is about to occur. Take action!

Flood Emergency Safety First rule of flood safety- move to higher ground and stay away from flood waters. –Do not try to cross streams and rivers that look flooded. –Do not play in water. A few centimeters of water can sweep you off your feet. –Do not try to drive on a flooded road. Moving water can sweep a car away. Leave the car and move to higher ground.

Other Flood Hazards Floods can knock down electrical poles, wires- cutting off power supplies. Can saturate soil, causing landslides or mudslides. Emergency vehicles cannot get through flooded roads. Flood waters can pollute water in wells and water treatment plants. –Be careful with anything that flood waters have touched. –Boil water before drinking it. Storm Menu