WEATHER HAZARDS

Hurricanes & Tropical Storms

Hurricanes are dangerous and can cause major damage because of storm surge, wind damage and flooding. They can happen along any U.S. coast or in any territory in the Atlantic or Pacific oceans. Storm surge is historically the leading cause of hurricane-related deaths in the United States.

How Can You Prepare for a Hurricane?

  • Know your hurricane risk

  • Make an emergency plan

  • Know your evacuation zone

  • Recognize warnings and alerts

  • Get tech ready

  • Gather supplies

Stay Informed and Safe During a Hurricane

  • Pay attention to emergency information and alerts.

  • If you live in a mandatory evacuation zone and local officials tell you to evacuate, do so immediately.

Explore more information on hurricane weather.

Hurricane Season: June 1 through November 30

Each year, many coastal communities experience heavy rains, strong winds, floods and coastal storm surges from tropical storms and hurricanes. A hurricane’s high winds may spawn tornadoes. Torrential rains cause further damage by causing floods and landslides, which not only threaten coastal communities but may impact communities many miles inland. The Atlantic hurricane season runs June 1 through November 30 with the peak occurring between mid-August and late October.

No matter which region of the Commonwealth you live in, a hurricane or tropical storm can impact you and your family. Prepare BEFORE the storm hits by building an emergency kit and reviewing the disaster preparedness guidelines.

Lightning & Thunderstorms

If you can hear thunder, you can be struck by lightning.

Know the Terms

  • Severe Thunderstorm Watch: large hail, winds 58 mph or greater or a tornado are possible in your area in the next 3 to 6 hours.

  • Severe Thunderstorm Warning: large hail, winds 58 mph or greater or a tornado are happening in your area or are about to happen.

30 / 30 Rule

Use the 30 / 30 rule:

  • If the time between the flash of lightning and the sound of thunder is 30 seconds or less, then lightning is close enough to strike you. Go inside immediately.

  • Wait inside until 30 minutes have passed since the last flash of lightning.

Create a Plan

  • If a thunderstorm is likely in your area, go indoors and use the 30 / 30 rule.

  • Listen to local TV or radio for weather watches and warnings.

  • Plumbing, bathroom fixtures and corded telephones can conduct electricity and cause serious injury.

  • Secure outdoor items that could blow away.

  • Unplug computers or television sets to prevent power surges.

Swimming & Boating Safety

Being around water can be especially dangerous for young children. Children can drown in as little as 2 inches of water. Drownings are 100% preventable by following these water safety tips:

  • Always watch children in or near water. Never leave them unattended, not even for short periods of time.

  • Install safety devices like barriers, covers and alarms around your pool or spa.

  • Learn to swim and teach children how to swim.

  • Ensure all pools and spas have compliant drain covers and teach children to stay away from them.

Water Safety for Everyone:

  • Swim with a friend. Even strong swimmers should make sure they are in the water with someone else who can swim.

  • Know how to perform CPR on children and adults.

  • At the beach or in a lake, only swim in areas with a lifeguard on duty. Follow all signs and warnings.

  • Stay alert to rip currents. Check water conditions before going in by looking at the local beach forecast before you leave. Visit the National Weather Service Before You Go in the Water page to learn more about what to do if you’re caught in a rip current.

  • Keep an eye on the weather forecast. If a thunderstorm approaches when you are swimming or near water, get out of the water and seek shelter in a house, large building or car with its windows closed.

  • Know how deep the water is. Do not dive into the water if you don’t know how deep it is. Diving into shallow water can cause serious injury or death. Even strong swimmers should be aware when they are in deep water.

Boat Owners and Passenger Safety

Wear a life jacket. The best life jacket is the one you will wear. Visit the U.S. Coast Guard life jacket web page to learn how to pick the right life jacket.

Flooding

Flooding is a temporary overflow of water onto land that is normally dry. Floods are the most common natural disaster in the United States. Failing to evacuate flooded areas or entering flood waters can lead to injury or death.

Floods may:

  • Result from rain, snow, coastal storms, storm surges and overflows of dams and other water systems.

  • Develop slowly or quickly. Flash floods can come with no warning.

  • Cause outages, disrupt transportation, damage buildings and create landslides.

If You Are Under a Flood Warning, Find Shelter Right Away

  • Do not walk, swim or drive through flood waters. Turn Around, Don’t Drown!

    • Just six inches of moving water can knock you down, and one foot of moving water can sweep your vehicle away.

  • Stay off bridges over fast-moving water.

    • Depending on the type of flooding:

      • Evacuate if told to do so.

      • Move to higher ground or a higher floor.

      • Stay where you are.

Explore more information on flooding.

Tornadoes

Know the Terms

  • Tornado Watch: A tornado is possible in your area. You should monitor weather alert radios, local radio and TV stations for information.

  • Tornado Warning: A tornado has been sighted in the area or has been indicated by National Weather Service Doppler radar. When a warning is issued, take cover immediately.

Create a Plan

  • Decide where you will go in case of a tornado warning. Include an emergency meeting place for your family.

  • Pick a safe room in your home:

    • If an underground shelter is not available, go into a windowless interior room, closet or hallway on the lowest floor possible.

    • If you are in a high-rise building, you may not have enough time to go to the lowest floor. Pick a place in a hallway in the center of the building.

    • Stay away from windows, doors and outside walls. Go to the center of the room. Stay away from corners because they attract debris.

    • Storm cellars or basements give the best protection.

    • A vehicle, trailer or mobile home does not provide good protection. Go to a nearby sturdy building or lie down in a ditch away from your home, covering your head with your hands. Mobile homes are extremely unsafe during tornadoes.

If You Are Away From Home

  • Cars and trucks: Get out of your vehicle and try to find shelter inside a sturdy building. A culvert or ditch can provide shelter if a substantial building is not nearby. Lie down flat and cover your head with your hands. Do not get under an overpass or bridge. You are safer in a low, flat location.

  • Open buildings (shopping mall, gym or civic center): Try to get into a restroom or interior hallway. If there is no time, get up against something that will support or deflect falling debris. Protect your head by covering it with your arms.

Summer Weather

Heat and Drought 

  • Heat waves can be dangerous and even life-threatening for people who don’t take the proper precautions.

  • According to the National Oceanic and Atmospheric Administration, there were 375 heat-related deaths in 2021. Heat also holds the highest 10-year average of deaths per year with 153 fatalities, and the highest 30-year average of any hazard at 164 fatalities.

  • Most heat disorders occur because the victim has been overexposed to heat or has over-exercised for his or her age and physical condition. Older adults, young children, and those who are sick, or overweight are more likely to succumb to extreme heat.

  • Extreme heat and high humidity slow evaporation, and the body must work extra hard to maintain a normal temperature.

  • During times of extreme heat, many areas may also see reduced rainfall or drought. As the summer continues and temperatures rise, there may be an increased risk of drought in our region. If a drought should occur, it is important to know what measures to take to decrease the impact to yourself and property.

Heat Preparedness

Know the terms:  

  • Heat Wave - A period of abnormally and uncomfortably hot and unusually humid weather. Typically, a heat wave lasts two or more days.

  • Heat Index - The Heat Index (HI) or the "Apparent Temperature" is an accurate measure of how hot it really feels when the Relative Humidity (RH) is added to the actual air temperature.

  • Heat Cramps - A condition marked by sudden development of cramps in skeletal muscles. It results from prolonged work or exercise in high temperatures accompanied by profuse perspiration with loss of sodium chloride from the body.

  • Heat Exhaustion - A mild form of heat stroke, characterized by faintness, dizziness, and heavy sweating

  • Heat Stroke - A life-threatening condition marked especially by cessation of sweating, extremely high body temperature, and collapse that results from prolonged exposure to high temperature — compared to

  • Sun Stroke - Another term for heat stroke.

  • Excessive Heat Watch - Issued by the National Weather Service when heat indices exceeding 105ºF (41ºC) during the day combined with nighttime low temperatures of 80ºF (27ºC) or higher are forecast to occur for two consecutive days.

  • Excessive Heat Warning - Issued within 12 hours of the onset of the following criteria: heat index of at least 105°F for more than three hours per day for two consecutive days, or heat index more than 115°F for any period of time.

  • Heat Advisory - Issued within 12 hours of the onset of the following conditions: heat index of at least 105°F but less than 115°F for less than three hours per day, or nighttime lows above 80°F for two consecutive days.

Before extreme heat occurs, it is important to take steps now to prepare:

  • Install window air conditioners snugly; insulate if necessary.

  • Check air conditioning ducts for proper insulation.

  • Install temporary window reflectors (for use between windows and drapes), such as aluminum foil-covered cardboard, to reflect heat back outside.

  • Weather-strip doors and sills to keep cool air in.

  • Cover windows that receive morning or afternoon sun with drapes, shades, awnings or louvers. (Outdoor awnings or louvers can reduce the heat that enters a home by up to 80 percent.)

  • Keep storm windows up all year.

  • Listen to local weather forecasts and be aware of possible temperature changes.

  • Know those in your neighborhood who might be most at risk to excessive heat and may need help.

  • Be aware that people living in urban areas may be at greater risk from the effects of a prolonged heat wave than people living in rural areas.

  • Get trained in first aid to learn how to treat heat-related emergencies.

What you should do if the weather is extremely hot:

  • Listen to NOAA Weather Radio for critical updates from the National Weather Service (NWS).

  • Never leave children or pets alone in closed vehicles.

  • Stay indoors as much as possible and limit exposure to the sun.

  • Stay on the lowest floor and out of direct sunshine if air conditioning is not available.

  • Postpone outdoor games and activities.

  • If you must be outside, protect yourself by using sunscreen on exposed skin.

  • Consider spending the warmest part of the day in temperature-controlled buildings such as libraries, schools, movie theaters, shopping malls and other community facilities. Remember to practice social distancing.

  • Circulating air can cool the body by increasing the rate at which perspiration evaporates.

  • Eat well-balanced, light, and regular meals. Avoid using salt tablets unless directed to do so by a physician.

  • Drink plenty of water, even if you do not feel thirsty. Avoid drinks with caffeine. Persons who have epilepsy or heart, kidney, or liver disease; are on fluid-restricted diets; or have a problem with fluid retention should consult a doctor before increasing liquid intake.

  • Limit intake of alcoholic beverages.

  • Dress in loose-fitting, lightweight, and light-colored clothes that cover as much skin as possible. Avoid dark colors because they absorb the sun’s rays.

  • Protect your face and head by wearing a wide-brimmed hat.

  • Avoid strenuous work during the warmest part of the day. Use a buddy system when working in extreme heat and take frequent breaks.

  • Check on family, friends, and neighbors who do not have air conditioning and who spend much of their time alone.

  • Avoid extreme temperature changes.

  • Check on your animals frequently to ensure that they are not suffering from the heat.

  • People living in urban areas may be at greater risk from the effects of a prolonged heat wave than those living in rural areas. Asphalt and concrete store heat longer and gradually release heat at night, which can produce higher nighttime temperatures known as the "urban heat island effect."

Drought Preparedness

Indoor Water Conservation Tips Prior to a Drought (General, Bathroom, Kitchen):

  • Never pour water down the drain when there may be another use for it. For example, use it to water your indoor plants or garden.

  • Repair dripping faucets by replacing washers. One drop per second wastes 2,700 gallons of water per year.

  • Check all plumbing for leaks and have any leaks repaired by a plumber.

  • Retrofit all household faucets by installing aerators with flow restrictors.

  • Install an instant hot water heater on your sink.

  • Insulate your water pipes to reduce heat loss and prevent them from breaking.

  • Install a water-softening system only when the minerals in the water would damage your pipes. Turn the softener off while on vacation.

  • Choose appliances that are more energy and water efficient.

  • Consider purchasing a low-volume toilet that uses less than half the water of older models. Note: In many areas, low-volume units are required by law.

  • Install a toilet displacement device to cut down on the amount of water needed to flush. Place a one-gallon plastic jug of water into the tank to displace toilet flow (do not use a brick, it may dissolve, and loose pieces may cause damage to the internal parts). Be sure installation does not interfere with the operating parts.

  • Replace your showerhead with an ultra-low-flow version.

  • Start a compost pile as an alternate method of disposing of food waste or simply dispose of food in the garbage. (Kitchen sink disposals require a lot of water to operate properly)

Outdoor Water Conservation Tips Prior to a Drought (general, lawn, pool):

  • Check your well pump periodically. If the automatic pump turns on and off while water is not being used, you have a leak.

  • Plant native and/or drought-tolerant grasses, ground covers, shrubs, and trees. Once established, plants adapted to your local climate do not need water as frequently and usually will survive a dry period without watering. Small plants require less water to become established. Group plants together based on similar water needs.

  • Install irrigation devices that are the most water efficient for each use, such as micro and drip irrigation, and soaker hoses.

  • Use mulch to retain moisture in the soil. Mulch also helps control weeds that compete with landscape plants for water.

  • Avoid purchasing recreational water toys that require a constant stream of water.

  • Avoid installing ornamental water features (such as fountains) unless they use re-circulated water.

  • Consider rainwater harvesting where practical.

  • Contact your local water provider for information and assistance.

  • Position sprinklers so water lands on the lawn and shrubs and not on paved areas.

  • Repair sprinklers that spray a fine mist. Most misting issues result from a pressure problem. Properly regulating pressure in an irrigation system will prevent misting.

  • Check sprinkler systems and timing devices regularly to be sure they operate properly.

  • Raise the lawn mower blade to at least 3 inches or to its highest level. A higher cut encourages grass roots to grow deeper, shades the root system, and holds soil moisture.

  • Plant drought-resistant lawn seed. Reduce or eliminate lawn areas that are not used frequently.

  • Avoid overfertilizing your lawn. Applying fertilizer increases the need for water. Apply fertilizers that contain slow-release, water-insoluble forms of nitrogen.

  • Choose a water-efficient irrigation system such as drip irrigation for your trees, shrubs and flowers.

  • Turn irrigation down in fall and off in winter. Water manually in winter only if needed.

  • Put a layer of mulch around trees and plants to reduce evaporation and keep the soil cool. Organic mulch also improves the soil and prevents weeds.

  • Invest in a weather-based irrigation controller—or a smart controller. These devices will automatically adjust the watering time and frequency based on soil moisture, rain, wind, and evaporation and transpiration rates. Check with your local water agency to see if there is a rebate available for the purchase of a smart controller.

  • Install a new water-saving pool filter. A single back flushing with a traditional filter uses 180 to 250 gallons of water.

  • Cover pools and spas to reduce evaporation of water.

Additional Online Resources

Winter Weather

Winter Weather 

Create an emergency supply kit for your vehicle. Include jumper cables, sand, a flashlight, warm clothing, blankets, bottled water and non-perishable snacks. Make sure to keep a full tank of gas. 

Gather supplies in case you need to stay home for several days without power. Keep in mind each person's specific needs, including medication. Remember the needs of your pets. Have extra batteries for radios and flashlights, and have a portable phone charger if possible! 

Winter Storm Warning

Issued when hazardous winter weather in the form of heavy snow, heavy freezing rain or heavy sleet is imminent or occurring. Winter Storm Warnings are usually issued 12 to 24 hours before the event is expected to begin. 

Winter Storm Watch

Alerts the public to the possibility of a blizzard, heavy snow, heavy freezing rain or heavy sleet. Winter Storm Watches are usually issued 12 to 48 hours before the beginning of a winter storm.

Winter Weather Advisory

Issued for accumulations of snow, freezing rain, freezing drizzle and sleet that will cause significant inconveniences and, if caution is not exercised, could lead to life-threatening situations.

Mitigation

Floodplain Administrator

The Engineering Services department serves as the County's Floodplain Administrator. If you have any questions regarding flood insurance or floodplain mitigation, please call 804-693-5480.

Flood Information

For Gloucester County Flood Information, visit the Gloucester Flood Management website.