The statistics are scary: Each year in the United States, an average of 55 people die from lightning strikes, and hundreds more are permanently injured.
To date in 2011, there have been five lightning-related deaths, including a 13-year-old boy who was killed while bailing hay in Pennsylvania.
But remembering just five words could mean the difference between life and death for you or the Scouts in your unit: “When Thunder Roars, Go Indoors.”
This is a good time for me to bring it to your attention because it’s Lightning Safety Week, the National Weather Service’s annual reminder about the dangers of lightning and how to minimize your risk.
Once you hear thunder, lightning is close enough to strike you. Follow these guidelines to minimize your risk. I wrote them with the help of Richard Bourlon, the BSA’s Health and Safety expert:
Go indoors. The single most important step you can take in a thunderstorm is getting everyone in your unit inside a safe shelter. There’s no safe place outside in a thunderstorm. A tent does not count as a safe shelter.- Find a vehicle. Your next best bet if a safe building isn’t nearby is to get into an enclosed, metal-topped vehicle.
- Get to a lower elevation. If you aren’t near a shelter, get off elevated areas such as hills, mountain ridges, or peaks.
- Stay away from isolated or tall trees, bodies of water, or objects that conduct electricity (power lines, windmills, metal fences, etc.) if you aren’t near a shelter.
- Assist victims. People struck by lightning do not carry an electrical charge and need immediate medical attention. Call 911, and begin CPR or the use of an AED immediately, if it’s needed.
- Train yourself. Prepare for lightning and other weather-related dangers by taking the BSA Weather Hazard training, available through MyScouting.
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(Photo of the Columbia River by Flickr user Phatman)
A couple more to consider:
7. Seek shelter in a grove of trees that create a canopy of cover.
8. Stay sheltered until 30 minutes after hearing the last thunder.
9. If you can’t get to shelter, keep your feet close together and squat down to reduce the risk of being struck and to minimize potential injury. Covering your ears with your hands can reduce hearing damage. Putting a sleeping pad under your feet provides a small amount of insulation. Set your trek poles, fishing pole, and backpack away from you.
THe Hazardous Weather module on MyScouting.org has some helpful pointers. http://MyScouting.org (your link doesn’t work)
but Bryan, what could we do when we are camping in tents where vehicles and building are not available ?
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Great Post Bryan,
A few additional pointers and background information might be added to help improve safety.
1. For those caught outdoors in an open or exposed area where lightning strikes may be
imminent, and shelter (either in a building or a metal-topped vehicle) are not immediately
available, experts recommend crouching to the ground with both feet as close together as
possible, and hands covering ears. If there is a non-conducting surface such as a sleeping bag
foam pad, or non metal frame pack, crouch on top of those to help insulate feet from ground
currents. A crouched position close to the ground may lessen exposure to a direct strike, and
keeping feet together helps to lessen exposure to ground currents that may travel in the soil from
a nearby strike and pass up via legs to the heart which can cause ventricular fibrillation and
sudden cardiac arrest (SCA). Covering the ears with hands may help prevent hearing loss due to
the loud noise created by a nearby lightning strike.
2. Static electricity causing hair to stand up, crackling or popping sounds, or sparks, or a bluish
glow on metal such as eyeglass frames or wires, may indicate that a strike is imminent and to
take shelter immediately or assume the crouching position described above if no shelter is
available.
3. Never lie down flat on the ground or in a ditch (as older information used to advocate), as
ground currents can pass through the body causing the same SCA effect noted above. Avoid
sheltering under rock overhangs or shallow caves as lightning streamers can follow wet rock
surfaces and strike victims. Deep caves may provide safer sheltering. Rock climbers on exposed
rock faces should evacuate at the earliest sign of thunderstorms. Being caught on a rock face
during a storm can have deadly consequences.
4. Evidence of previous lightning strikes such as split or burned trees or blackened grass in open
areas or on ridges may indicate a high probability of additional strikes in the same area during
storms. The old adage that “lightning never strikes the same place twice” is completely false and
dangerous to believe. Lightning strikes to trees may cause them to fragment (or burn).
5. If sheltering under dense trees, be wary of high winds that often accompany severe
thunderstorms and may cause trees to break and fall suddenly to the ground.
Be aware of possible flash flooding associated with severe storms and stay out of low areas,
streambeds, even dry gulleys where water can flow suddenly. Floods and flash floods kill more than 150 people annually. A severe storm miles away can cause flash flooding in an area much further downstream that may not even be receiving rain. Never attempt to cross or drive through flooded areas. Move to high ground on foot in case of flash floods.
Tornadoes are also a risk associated with severe thunderstorms especially in flat open areas, occur spontaneously with no warning, and often cause deaths, injuries and massive property damage. Again sheltering in solid buildings and basements are generally the safest location.
6. Groups caught out in the open during a storm should spread out widely [50+ feet apart] rather
than remaining in close contact in case some of the group members are struck or affected by
ground currents. Others may not be affected and can go to the aid of those who are injured.
7. Ground currents from a nearby strike can still cause serious injury or death even if none of the
victims are struck directly by a bolt. This is often seen where herds of cattle or other animals are
simultaneously killed by ground currents even though there is no evidence of a direct strike on
any animal, but a nearby tree, fence or the ground may have been hit. Victims of ground
current-caused SCA may have the greatest chance of being successfully resuscitated with CPR
and AED and thus probable survival, if promptly cared for by other rescuers.
8. Some groups carry portable lightning detectors [see link below] which signal when
lightning is nearby and can give early warning of imminent danger. Lightning can travel from
clouds as far away as 10+ miles in what appears to be a clear, blue sky, and has been known to
cause injuries or death of unsuspecting individuals in the outdoors. Always check weather
forecasts and listen to NOAA Weather Radio for warning of severe thunderstorms in the area.
Inexpensive NOAA weather radio receivers are miniaturized, portable and can be obtained at
local electronics stores. Modify or cancel trip plans in exposed areas until weather is less
threatening.
[from FEMA website] “Flash to bang” is a way to measure how far away the lightning strike was.
The sound of thunder can go one mile in five seconds. So if you see the lightning strike and hear
the thunder ten seconds later, you know the lightning was two miles away. Scientists say that if
you are less than six miles away, you are in the high danger zone. Scientists know that lightning
can strike several miles away from a storm cloud
9. Make pre-activity plans of where to shelter quickly in advance of any outdoor event and
conduct sheltering drills and lightning strike simulation exercises with Scouts so they are
familiar and comfortable with what to do if a weather emergency arises suddenly.
10. If sheltering in a metal top vehicle, be sure to roll up windows and keep hands and body away
from contact with any metal surfaces. Contrary to popular opinion, vehicles do not protect
against lightning because of the “insulation provided by rubber tires.”.The metal skin and frame
of Vehicles acts as a “Faraday Cage” and conducts lightning around occupants directly to
ground, generally preventing injury to the occupants. Fabric topped convertibles or other
nonmetal coverings are not considered safe sheltering locations. The effect is similar for aircraft
struck by lightning while in flight which rarely causes damage to the aircraft, or injury to passengers.
11. If sheltering in a building, avoid small metal temporary buildings, sheds, carports that may
not offer sufficient protection. Regularly constructed buildings or homes used as a shelter are
generally the safest places to be. Stay away from windows, doors, porches, metal chimneys and
stoves. Avoid any contact with, and do not attempt to use electrical appliances or wired
telephones. Cordless phones and cell phones are safe to use during a storm but should only be
used for emergency communications as static from lightning can cause loud noises in the phone
that may damage hearing. Avoid contact with plumbing and do not use the toilet, sink, shower
or bathtub during a storm. A finished basement may be the safest location in the building. Do not lay on concrete floors or have contact with concrete walls.
Remember that lightning is completely unpredictable and may follow very unusual paths to
ground. Whole house surge protectors installed in electrical breaker boxes can help prevent
flashover surges that can damage electrical equipment and sometimes start fires. Proper NEC
code grounding of wiring is essential.
12. The NWS recommends remaining in sheltered locations until at least 30 minutes after the
storm has passed from the immediate area [after the last thunderclap is heard] due to the
possibility of lightning traveling back from the storm cell to the area where individuals are
sheltered.
13. A lightning bolt is more than three times hotter than the surface of the sun (20,000 degrees
C.) and is generally only about an inch wide but appears much larger due to the ionizing effect on
the air that it passes through. A bolt carries millions of volts and very high currents, so can cause
very serious injuries or death, and start fires as well as cause severe property damage. The
thunder accompanying a lightning bolt is caused by the electricity passing through the
atmosphere when the air suddenly collapses after the bolt has passed [similar to “sonic boom”
caused by high speed aircraft]. It takes about 20,000 volts to jump just an inch in normal
atmosphere so you can imagine how many volts are in a lightning bolt that travels several miles
from a cloud to the earth. Lightning can travel from cloud to ground, ground to cloud, or cloud
to cloud due to different electrical potentials. [see websites to understand how lightning is
generated by cumulo-nimbus storm cells. Anvil shaped clouds are very tall and the source of
tremendous energy.]
14. Victims of lightning strikes that recover may have lasting neurological impairments that
may cause severe pain, diminished control of muscles, impaired cognitive abilities and many
other physical and neurological complications.
15. Rapid resuscitation of victims who are in sudden cardiac arrest (SCA) with CPR and an AutomaticExternal Defibrillator (AED) may make the difference in surviving a lightning strike. AED’s are now light enough to carry in backpacks or in vehicles on outdoor activities and are very effective to restore cardiac function for victims of SCA from a variety of causes that CPR alone may not resolve in the very critical first few minutes known as the “cardiac chain of survival” after an SCA. For every minute that a victim is in cardiac arrest, the probability of survival decreases by about 10 percent, so rapid defibrillation is essential to lessen brain damage from lack of perfusion with oxygenated blood. [see websites on AEDs. BSA has an arrangement for Councils to help purchase AED’s from manufacturers at reduced rates. Grant funding is available through AED foundations.]
16. Rapid contact with a 9-1-1 emergency communications center to dispatch an Advanced
Cardiac Life Support (ACLS) ambulance or aeromedical helicopter is also essential in
the”cardiac chain of survival.” Having a reliable cell phone or even better, a satellite phone
(and/or two meter ham radios) and a GPS in remote areas may permit rapidly dispatching such
resources directly to the scene. Satellite phones while expensive to purchase can be rented for
outings in remote areas at reasonable rates. There isn’t much that even those with Wilderness First Aid training can do for SCA, other than initial CPR and AED defibrillation, so the victim must be rapidly evacuated to a hospital where ACLS definitive care is available.
Some helicopter services can fly directly from their base to a remote and isolated area in less than 30 minutes depending on the locale and terrain. It is important to be aware of how to communicate with and properly assist a helicopter to land safely and protect those on the ground. Transporting the victim promptly to a level 1 Trauma Center in under an hour from the onset of the strike can greatly improve survival chances for a lightning strike (or other SCA/ trauma) victim.
here are links to various websites with more details on topics mentioned above:
http://www.lightningsafety.noaa.gov/
http://www.lightningsafety.com/
http://www.scouting.org/sitecore/content/Home/HealthandSafety/SafetyThoughts/110531.aspx
http://en.wikipedia.org/wiki/Lightning_detection
http://en.wikipedia.org/wiki/Satellite_phone
Great pointers, Dean! Excellent tips here!
hey,what if you dont have a basement?
Bryan:
Thanks for that rhyme. I like when lessons are “kid friendly.”
We don’t get much of that lightning bolt type lightnings in Honolulu but I guess it’s better to safe and seek shelter, huh?
I think the Boy Scouts teach you so much practical/useful stuff it’s “cool.” Thanks for teaching our youth life skills!
-C