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Delaware

September 15th, 2003. A car is stopped as flooding waters rise on the road.
Sep 15, 2003
Tropical Storm Henri’s pounding rain flooded the state to such a degree that meteorologists called it a once-in-five-hundred-year event. Floodwater swallowed up hundreds of homes and businesses, including 194 in the Glenville area alone. Damage across the state was valued at $16.1 million.

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Some Common Natural Hazards
Hurricane in the Gulf of Mexico seen from space.

This page explains what actions to take when you receive a hurricane watch or warning alert from the National Weather Service for your local area. It also provides tips on what to do before, during, and after a hurricane.

Basic Preparedness Tips

  • Know where to go. If you are ordered to evacuate, know the local hurricane evacuation route(s) to take and have a plan for where you can stay. Contact your local emergency management agency for more information.
  • Put together a disaster supply kit, including a flashlight, batteries, cash, first aid supplies, and copies of your critical information if you need to evacuate
  • If you are not in an area that is advised to evacuate and you decide to stay in your home, plan for adequate supplies in case you lose power and water for several days and you are not able to leave due to flooding or blocked roads.
  • Make a family emergency communication plan.
  • Many communities have text or email alerting systems for emergency notifications.To find out what alerts are available in your area, search the Internet with your town, city, or county name and the word “alerts.”

Preparing Your Home

  • Hurricane winds can cause trees and branches to fall, so before hurricane season trim or remove damaged trees and limbs to keep you and your property safe.
  • Secure loose rain gutters and downspouts and clear any clogged areas or debris to prevent water damage to your property.
  • Reduce property damage by retrofitting to secure and reinforce the roof, windows and doors, including the garage doors.
  • Purchase a portable generator or install a generator for use during power outages. Remember to keep generators and other alternate power/heat sources outside, at least 20 feet away from windows and doors and protected from moisture; and NEVER try to power the house wiring by plugging a generator into a wall outlet.
  • Consider building a FEMA safe room or ICC 500 storm shelter designed for protection from high-winds and in locations above flooding levels.  

Hurricane Watch

Hurricane watch = conditions possible within the next 48 hrs.

Steps to take:

Hurricane Warning

Hurricane warning = conditions are expected within 36 hrs.

Steps to take:

  • Follow evacuation orders from local officials, if given.
  • Check-in with family and friends by texting or using social media.
  • Follow the hurricane timeline preparedness checklist, depending on when the storm is anticipated to hit and the impact that is projected for your location.

What to do when a hurricane is 6 hours from arriving

  • If you’re not in an area that is recommended for evacuation, plan to stay at home or where you are and let friends and family know where you are.
  • Close storm shutters, and stay away from windows. Flying glass from broken windows could injure you.
  • Turn your refrigerator or freezer to the coldest setting and open only when necessary. If you lose power, food will last longer. Keep a thermometer in the refrigerator to be able to check the food temperature when the power is restored.
  • Turn on your TV/radio, or check your city/county website every 30 minutes in order to get the latest weather updates and emergency instructions.

What to do when a hurricane is 6-18 hours from arriving

  • Turn on your TV/radio, or check your city/county website every 30 minutes in order to get the latest weather updates and emergency instructions.
  • Charge your cell phone now so you will have a full battery in case you lose power.

What to do when a hurricane is 18-36 hours from arriving

  • Bookmark your city or county website for quick access to storm updates and emergency instructions.
  • Bring loose, lightweight objects inside that could become projectiles in high winds (e.g., patio furniture, garbage cans); anchor objects that would be unsafe to bring inside (e.g., propane tanks); and trim or remove trees close enough to fall on the building.
  • Cover all of your home’s windows. Permanent storm shutters offer the best protection for windows. A second option is to board up windows with 5/8” exterior grade or marine plywood, cut to fit and ready to install.

What to do when a hurricane is 36 hours from arriving

  • Turn on your TV or radio in order to get the latest weather updates and emergency instructions.
  • Build or restock your emergency preparedness kit. Include a flashlight, batteries, cash, and first aid supplies.
  • Plan how to communicate with family members if you lose power. For example, you can call, text, email or use social media. Remember that during disasters, sending text messages is usually reliable and faster than making phone calls because phone lines are often overloaded.
  • Review your evacuation plan with your family. You may have to leave quickly so plan ahead.
  • Keep your car in good working condition, and keep the gas tank full; stock your vehicle with emergency supplies and a change of clothes.

After a Hurricane

  • Listen to local officials for updates and instructions.
  • Check-in with family and friends by texting or using social media.
  • Return home only when authorities indicate it is safe.
  • Watch out for debris and downed power lines.
  • Avoid walking or driving through flood waters. Just 6 inches of moving water can knock you down, and fast-moving water can sweep your vehicle away.
  • Avoid flood water as it may be electrically charged from underground or downed power lines and may hide dangerous debris or places where the ground is washed away.
  • Photograph the damage to your property in order to assist in filing an insurance claim.
  • Do what you can to prevent further damage to your property, (e.g., putting a tarp on a damaged roof), as insurance may not cover additional damage that occurs after the storm.

When there is no hurricane: Make a hurricane plan

  • Know your hurricane risk. Talk to your local emergency management agency.
  • Make an emergency plan.
  • Build or restock your basic disaster supplies kit, including food and water, a flashlight, batteries, chargers, cash, and first aid supplies.
  • Consider buying flood insurance.
  • Familiarize yourself with local emergency plans. Know where to go and how to get there should you need to get to higher ground or to evacuate.
  • Stay tuned to local wireless emergency alerts, TV, or radio for weather updates, emergency instructions, or evacuation orders.

Community Events

Resources

Lightning storm at night

All thunderstorms are dangerous. Every thunderstorm produces lightning. While lightning fatalities have decreased over the past 30 years, lightning continues to be one of the top three storm-related killers in the United States. On average in the U.S., lightning kills 51 people and injures hundreds more. Although most lightning victims survive, people struck by lightning often report a variety of long-term, debilitating symptoms.

Other associated dangers of thunderstorms include tornadoes, strong winds, hail and flash flooding. Flash flooding is responsible for more fatalities – more than 140 annually – than any other thunderstorm-associated hazard. Dry thunderstorms that do not produce rain that reaches the ground are most prevalent in the western United States. Falling raindrops evaporate, but lightning can still reach the ground and can start wildfires.

Before Thunderstorm and Lightning

To prepare for a thunderstorm, you should do the following:

  • To begin preparing, you should build an emergency kit and make a family communications plan.
  • Remove dead or rotting trees and branches that could fall and cause injury or damage during a severe thunderstorm.
  • Postpone outdoor activities.
  • Secure outdoor objects that could blow away or cause damage.
  • Get inside a home, building, or hard top automobile (not a convertible). Although you may be injured if lightning strikes your car, you are much safer inside a vehicle than outside.
  • Remember, rubber-soled shoes and rubber tires provide NO protection from lightning. However, the steel frame of a hard-topped vehicle provides increased protection if you are not touching metal.
  • Shutter windows and secure outside doors. If shutters are not available, close window blinds, shades or curtains.
  • Unplug any electronic equipment well before the storm arrives.

Lightning Risk Reduction When Outdoors

If you are:Then:
In a forestSeek shelter in a low area under a thick growth of small trees.
In an open areaGo to a low place such as a ravine or valley. Be alert for flash floods.
On open waterGet to land and find shelter immediately.

 

Facts about Thunderstorms

  • They may occur singly, in clusters or in lines.
  • Some of the most severe occur when a single thunderstorm affects one location for an extended time.
  • Thunderstorms typically produce heavy rain for a brief period, anywhere from 30 minutes to an hour.
  • Warm, humid conditions are highly favorable for thunderstorm development.
  • About 10 percent of thunderstorms are classified as severe – one that produces hail at least an inch or larger in diameter, has winds of 58 miles per hour or higher or produces a tornado.

Facts about Lightning

  • Lightning’s unpredictability increases the risk to individuals and property.
  • Lightning often strikes outside of heavy rain and may occur as far as 10 miles away from any rainfall.
  • “Heat lightning” is actually lightning from a thunderstorm too far away from thunder to be heard. However, the storm may be moving in your direction.
  • Most lightning deaths and injuries occur when people are caught outdoors in the summer months during the afternoon and evening.
  • Your chances of being struck by lightning are estimated to be 1 in 600,000 but could be reduced even further by following safety precautions.
  • Lightning strike victims carry no electrical charge and should be attended to immediately.

Know the Terms

Familiarize yourself with these terms to help identify a thunderstorm hazard:

Severe Thunderstorm Watch - Tells you when and where severe thunderstorms are likely to occur. Watch the sky and stay tuned to NOAA Weather Radio, commercial radio or television for information.

Severe Thunderstorm Warning - Issued when severe weather has been reported by spotters or indicated by radar. Warnings indicate imminent danger to life and property to those in the path of the storm.

During Thunderstorms and Lightning

If thunderstorm and lightning are occurring in your area, you should:

  • Use your battery-operated NOAA Weather Radio for updates from local officials.
  • Avoid contact with corded phones and devices including those plugged into electric for recharging.  Cordless and wireless phones not connected to wall outlets are OK to use.
  • Avoid contact with electrical equipment or cords. Unplug appliances and other electrical items such as computers and turn off air conditioners. Power surges from lightning can cause serious damage.
  • Avoid contact with plumbing. Do not wash your hands, do not take a shower, do not wash dishes, and do not do laundry. Plumbing and bathroom fixtures can conduct electricity.
  • Stay away from windows and doors, and stay off porches.
  • Do not lie on concrete floors and do not lean against concrete walls.
  • Avoid natural lightning rods such as a tall, isolated tree in an open area.
  • Avoid hilltops, open fields, the beach or a boat on the water.
  • Take shelter in a sturdy building. Avoid isolated sheds or other small structures in open areas.
  • Avoid contact with anything metal—tractors, farm equipment, motorcycles, golf carts, golf clubs, and bicycles.
  • If you are driving, try to safely exit the roadway and park. Stay in the vehicle and turn on the emergency flashers until the heavy rain ends. Avoid touching metal or other surfaces that conduct electricity in and outside the vehicle.

After a Thunderstorm or Lightning Strike

If lightning strikes you or someone you know, call 9-1-1 for medical assistance as soon as possible. The following are things you should check when you attempt to give aid to a victim of lightning:

  • Breathing - if breathing has stopped, begin mouth-to-mouth resuscitation.
  • Heartbeat - if the heart has stopped, administer CPR.
  • Pulse - if the victim has a pulse and is breathing, look for other possible injuries. Check for burns where the lightning entered and left the body. Also be alert for nervous system damage, broken bones and loss of hearing and eyesight.

After the storm passes remember to:

  • Never drive through a flooded roadway. Turn around, don’t drown!
  • Stay away from storm-damaged areas to keep from putting yourself at risk from the effects of severe thunderstorms.
  • Continue to listen to a NOAA Weather Radio or to local radio and television stations for updated information or instructions, as access to roads or some parts of the community may be blocked.
  • Help people who may require special assistance, such as infants, children and the elderly or those with access or functional needs.
  • Stay away from downed power lines and report them immediately.
  • Watch your animals closely. Keep them under your direct control.

Resources

FEMA and National Weather Service

If you require more information about any of these topics, the following resources may be helpful.

Related Websites

Find additional information on how to plan and prepare for a thunderstorm and learn about available resources by visiting the following websites:

Listen to Local Officials

Learn about the emergency plans that have been established in your area by your state and local government. In any emergency, always listen to the instructions given by local emergency management officials.

A tornado funnel cloud

Tornadoes are nature’s most violent storms. Spawned from powerful thunderstorms, tornadoes can cause fatalities and devastate a neighborhood in seconds. A tornado appears as a rotating, funnel-shaped cloud that extends from a thunderstorm to the ground with whirling winds that can reach 300 miles per hour. Damage paths can be in excess of one mile wide and 50 miles long. Every state is at some risk from this hazard. Some tornadoes are clearly visible, while rain or nearby low-hanging clouds obscure others. Occasionally, tornadoes develop so rapidly that little, if any, advance warning is possible. Before a tornado hits, the wind may die down and the air may become very still. A cloud of debris can mark the location of a tornado even if a funnel is not visible. Tornadoes generally occur near the trailing edge of a thunderstorm. It is not uncommon to see clear, sunlit skies behind a tornado.

Before a Tornado

  • To begin preparing, you should build an emergency kit and make a family communications plan.
  • Listen to NOAA Weather Radio or to commercial radio or television newscasts for the latest information. In any emergency, always listen to the instructions given by local emergency management officials.
  • Be alert to changing weather conditions. Look for approaching storms.
  • Look for the following danger signs:
    • Dark, often greenish sky
    • Large hail
    • A large, dark, low-lying cloud (particularly if rotating)
    • Loud roar, similar to a freight train.
    • If you see approaching storms or any of the danger signs, be prepared to take shelter immediately.

Tornado Facts

Quick facts you should know about tornadoes:

  • They may strike quickly, with little or no warning.
  • They may appear nearly transparent until dust and debris are picked up or a cloud forms in the funnel.
  • The average tornado moves Southwest to Northeast, but tornadoes have been known to move in any direction.
  • The average forward speed of a tornado is 30 mph, but may vary from stationary to 70 mph.
  • Tornadoes can accompany tropical storms and hurricanes as they move onto land.
  • Waterspouts are tornadoes that form over water.
  • Tornadoes are most frequently reported east of the Rocky Mountains during spring and summer months.
  • Peak tornado season in the southern states is March through May; in the northern states, it is late spring through early summer.
  • Tornadoes are most likely to occur between 3 pm and 9 pm, but can occur at any time.

Know the Terms

Familiarize yourself with these terms to help identify a tornado hazard:

Tornado Watch - Tornadoes are possible. Remain alert for approaching storms. Watch the sky and stay tuned to NOAA Weather Radio, commercial radio or television for information.

Tornado Warning - A tornado has been sighted or indicated by weather radar. Take shelter immediately.

During a Tornado

If you are under a tornado warning, seek shelter immediately!  Most injuries associated with high winds are from flying debris, so remember to protect your head.

If you are in:Then:
A structure (e.g. residence, small building, school, nursing home, hospital, factory, shopping center, high-rise building)
  • Go to a pre-designated area such as a safe room, basement, storm cellar, or the lowest building level. If there is no basement, go to the center of a small interior room on the lowest level (closet, interior hallway) away from corners, windows, doors, and outside walls. Put as many walls as possible between you and the outside. Get under a sturdy table and use your arms to protect your head and neck.
  • In a high-rise building, go to a small interior room or hallway on the lowest floor possible.
  • Put on sturdy shoes.
  • Do not open windows.
A manufactured home or office
  • Get out immediately and go to a pre-identified location such as the lowest floor of a sturdy, nearby building or a storm shelter. Mobile homes, even if tied down, offer little protection from tornadoes.
The outside with no shelter

If you are not in a sturdy building, there is no single research-based recommendation for what last-resort action to take because many factors can affect your decision. Possible actions include:

  • Immediately get into a vehicle, buckle your seat belt and try to drive to the closest sturdy shelter. If your vehicle is hit by flying debris while you are driving, pull over and park.
  • Take cover in a stationary vehicle. Put the seat belt on and cover your head with your arms and a blanket, coat or other cushion if possible.
  • Lie in an area noticeably lower than the level of the roadway and cover your head with your arms and a blanket, coat or other cushion if possible.

In all situations:

  • Do not get under an overpass or bridge. You are safer in a low, flat location.
  • Never try to outrun a tornado in urban or congested areas in a car or truck. Instead, leave the vehicle immediately for safe shelter.
  • Watch out for flying debris. Flying debris from tornadoes causes most fatalities and injuries.

Build a Safe Room

Extreme windstorms in many parts of the country pose a serious threat to buildings and their occupants. Your residence may be built "to code" but that does not mean it can withstand winds from extreme events such as tornadoes and major hurricanes. The purpose of a safe room or a wind shelter is to provide a space where you and your family can seek refuge that provides a high level of protection. You can build a safe room in one of several places in your home.

  • Your basement
  • Atop a concrete slab-on-grade foundation or garage floor.
  • An interior room on the first floor.

Safe rooms built below ground level provide the greatest protection, but a safe room built in a first-floor interior room also can provide the necessary protection. Below-ground safe rooms must be designed to avoid accumulating water during the heavy rains that often accompany severe windstorms.

To protect its occupants, a safe room must be built to withstand high winds and flying debris, even if the rest of the residence is severely damaged or destroyed. Consider the following when building a safe room:

  • The safe room must be adequately anchored to resist overturning and uplift.
  • The walls, ceiling and door of the shelter must withstand wind pressure and resist penetration by windborne objects and falling debris.
  • The connections between all parts of the safe room must be strong enough to resist the wind.
  • Sections of either interior or exterior residence walls that are used as walls of the safe room must be separated from the structure of the residence so that damage to the residence will not cause damage to the safe room.

Additional information about Safe Rooms available from FEMA:

Resources

If you require more information about any of these topics, the following resources may be helpful.

Related Websites

Find additional information on how to plan and prepare for a tornado and learn about available resources by visiting the following websites:

Listen to Local Officials

Learn about the emergency plans that have been established in your area by your state and local government. In any emergency, always listen to the instructions given by local emergency management officials.