One of the deadliest and most destructive aspects of hurricanes is their ability to generate massive storm surges.
What is a storm surge?
A storm surge is a dome of water that forms over the ocean due to the strong winds and low pressure associated with a hurricane. The surge moves onshore as the hurricane approaches land, and can reach heights of up to 20 feet or more.
Storm surges are caused by several factors, including:
- Wind: The strong winds of a hurricane generate friction on the surface of the ocean, pushing the water toward the shore.
- Atmospheric pressure: The low atmospheric pressure inside the hurricane creates a dome-shaped bulge of water beneath the storm.
- Earth's rotation: The Coriolis effect, caused by the Earth's rotation, deflects the storm surge to the right in the Northern Hemisphere and the left in the Southern Hemisphere. This can lead to higher storm surges on one side of the hurricane than the other.
Why are storm surges so dangerous?
Storm surges can be incredibly destructive, causing widespread flooding and damage to coastal areas. The following factors contribute to their danger:
- Height: Storm surges can reach heights of up to 20 feet or more, which can submerge entire coastal communities.
- Speed: Storm surges can travel onshore at speeds of up to 30 miles per hour, making it difficult for people to evacuate to safety.
- Debris: Storm surges often carry debris, such as cars, boats, and trees, which can cause significant damage to buildings and infrastructure.
- Flooding: Storm surges can cause flooding that can extend far inland, destroying homes, businesses, and infrastructure.
Storm surges can also lead to loss of life. In the United States, storm surges have been responsible for more than half of all hurricane-related deaths.
How can we protect ourselves from storm surges?
There are several steps that can be taken to protect ourselves from storm surges, including:
- Evacuating: If a hurricane warning is issued, it is important to evacuate to a safe location away from the coast.
- Staying informed: Monitor the weather forecast and listen to local news broadcasts for updates on the hurricane's track and intensity.
- Securing your home: Board up windows and doors, and remove any loose objects that could be blown away by the wind.
- Stocking up on supplies: Make sure you have enough food, water, and other essential supplies to last for several days.
By following these steps, we can help to reduce our risk of injury or death from storm surges.
