Why Ice Storms Are So Destructive
Knowing how ice does its damage tells you what to protect and how long to plan to be on your own. Here are the mechanism, the forecast terms and one storm that shows the scale. A checklist to beat the ice comes next.
Freezing Rain Starts Above You
Freezing rain starts as snow high in the clouds. It falls through a warm layer of air and melts into rain. Near the ground it passes through a thin layer of air below freezing. The drops chill below 32 degrees F but stay liquid. When they touch a branch, a wire or a windshield, they freeze on contact. Coat after coat of clear ice builds for hours.
The Weight of a Half Inch
A half inch of ice around one span of power line adds hundreds of pounds to it. A tree limb can carry many times its own weight in ice. A quarter inch starts bringing down branches and lines. A half inch brings down whole trees.
Why the Outage Lasts a Week
Ice damages lines across a whole region at once. Crews clear fallen trees before they can reach the wires. They repair transmission lines and substations first, then main lines, then side streets, then the single wire to your house. That order makes one week a fair planning number for ice storm preparation. Rural homes at the end of a long line often wait the longest.
Forecast Terms That Start the Clock
- Freezing rain advisory: The National Weather Service expects light ice that glazes roads and walks. Finish your errands and fuel the car.
- Winter storm watch: Significant ice or snow is possible within a few days. Start working through your checklist.
- Ice storm warning: Damaging ice is expected, often a quarter inch or more depending on your area. Plan to lose power and stay home for days.
The Great Ice Storm of 1998
In January 1998, freezing rain fell for days across Ontario, Quebec, northern New York and northern New England. Some areas built up three inches of ice or more. Steel transmission towers folded, and millions of people lost power. Many waited weeks, and parts of Quebec went more than a month. The households that did best had their own heat, water and food. Ice can reach places that rarely see it, too: the 2026 El Nino is now the strongest on record, and NOAA favors a wet winter across the South.
Ice Storm Preparation Before the Ice Arrives
A few hours of work before the freezing rain gets you a safer roof, a stocked kitchen and a week at home with no trip to the store. The checklist runs from this weekend to the night before. Living through the outage comes next.
Falling Limbs
Trim limbs that hang over the roof, the driveway and your parking spot. A 50-pound limb can weigh several hundred pounds under ice. Cut small limbs from the ground with a pole saw. Hire a certified arborist for big limbs and anything that needs a ladder. Call the utility about limbs near the wire to your house, since it can trim them or make the line safe for a tree crew. If you rent, send your landlord a written request with a photo. If you have more trees than time, start with the ones over bedrooms.
Water and Food for One Week
Stock one gallon of water per person per day for seven days, plus water for pets. A family of four needs 28 gallons. Fill the bathtub before the storm, and pour a bucket into the toilet bowl to flush. If you are on a well, the pump stops with the power, so fill every clean jug the night before. If you are on city water, the tap usually keeps running and your stored water becomes the backup.
Lay in food that needs no cooking: canned beans, tuna and chicken, peanut butter, crackers, cereal, shelf-stable milk and granola bars. Keep a manual can opener in the same bin.
Fuel, Light and Power
- Light: Give each person a headlamp or flashlight, and set a battery lantern in the warm room. A lantern lights the whole table, and flashlights vanish into couch cushions.
- Batteries and power banks: Buy spares in every size you use, and charge every phone and power bank the day before.
- Heating fuel: Stack dry firewood under cover, or fill propane or kerosene for heaters rated for indoor use.
- Generator fuel: Store gasoline in approved cans away from the house, with fuel stabilizer added.
Our plan for extended power outages goes deeper on lighting and backup power for any long outage.
Medicine and Medical Needs
Refill prescriptions so you have at least a week on hand. If anyone uses oxygen, a CPAP or another powered device, ask the utility about its medical needs registry. Then lay in a battery backup and find the nearest warming center. A plan to get that person somewhere warm and powered is core ice storm preparation.
The Car
Fill the tank before the advisory becomes a warning, since gas pumps need power too. Park in the open away from trees and lines, or in the garage. If you use the garage, learn the manual release on the door opener now so you can drive out when the power is off. A full tank also makes the car a phone charger. Run it only outdoors, with the tailpipe clear of ice and snow.
Living Through Days Without Power
The right setup turns a cold house into one warm room where your family can eat, sleep and wait out the repairs. You get how to hold that room, heat it safely, handle the food and stay in touch. The hazards after the storm come last.
Preppers call this bugging in, and an ice storm is the textbook case for it. Good ice storm preparation makes staying put the easy choice.
One Warm Room
Pick one small room with few windows near the center of the house, and heat only that room. If you have a wood stove or fireplace, that room is your warm room. If you have only electric heat, pick the room with the most sun and the fewest drafts. Close the doors to the rest of the house. Hang blankets over doorways and windows, and roll a towel against the gap under the door. Bring mattresses in at night.
A small room heats fast, and every person in it adds body heat. A large family is more people to keep warm and also more warm bodies in the room. Dress in layers and wear hats indoors. Watch the oldest and youngest for shivering, slurred speech or confusion, the early signs of hypothermia, and warm them right away. Our guide on how to heat your home without power covers each heat source in more detail.
Carbon Monoxide
Carbon monoxide comes with every fuel-burning heat source, and it has no smell or color. It is a leading cause of death after ice storms. Put a battery carbon monoxide alarm on every level of the home and one in the warm room.
- Generators: Run them outdoors, at least 20 feet from windows, doors and vents, with the exhaust pointed away.
- Indoor heaters: Use only propane or kerosene heaters labeled for indoor use, and crack a window an inch.
- Fireplaces and stoves: Open the damper before you light the fire, and keep it open until the ashes are cold.
- Grills and camp stoves: Keep them outside in the open air.
If the alarm sounds, or several people get headaches, dizziness or nausea at once, get everyone outside and call 911.
Spoiled Food
Keep the fridge and freezer closed. A closed fridge keeps food cold for about four hours. A full freezer holds for about 48 hours, and a half-full one for about 24. Put an appliance thermometer in each. Eat from the fridge first, then the freezer, then the pantry. Throw out meat, dairy, eggs and leftovers that sat above 40 degrees F for more than two hours.
The cold outside is a resource. Pack perishables in a cooler and set it in the shade outdoors or in an unheated garage. Put a thermometer inside, since winter sun warms a cooler faster than you expect. Latch the lid against raccoons.
Staying in Touch
Set a check-in plan before the storm: who texts whom, and when. Texts often get through when calls fail. Keep a battery or hand-crank weather radio for forecasts and restoration news. If you live alone, set a daily check-in with a neighbor or relative.
Glazed Roads
Stay home while the roads are iced. The glaze is smooth and hard to see, and fallen trees and lines block the way. If you must drive for a medical need, go in daylight, go slowly, and tell someone your route. Safe winter driving tips and a stocked car kit cover that trip.
After the Ice: Downed Lines and Falling Limbs
Knowing the hazards that stay behind lets you clean up without anyone getting hurt. You get the four dangers that last after the storm, then three steps to take in order. The last stage of ice storm preparation is a slow, careful cleanup.
Downed Power Lines
Treat every downed line as live. A line can look dead and still carry current, and power can return without warning. Keep at least 35 feet back from the line and anything it touches, including fences, puddles and cars. Report it to the utility and 911. Keep kids and pets inside until the yard is clear. If a line falls on your car, stay inside and call for help. If the car catches fire, jump clear with both feet together and shuffle away in small steps.
Falling Limbs During the Thaw
Limbs keep falling for days as the ice melts and the wind picks up. Broken branches caught in the canopy, called hangers or widowmakers, drop with no warning. Walk and park in the open, and look up before you step under a tree.
Chainsaw Injuries
Trees bent under ice are loaded like springs, and a cut can make a trunk snap back hard. Wear chainsaw chaps, eye and ear protection, gloves and a helmet. Cut only what you can reach from the ground, on firm footing, with a partner nearby. Leave bent trees, hangers and anything near a line to an arborist.
Generator Back-Feed
Plug appliances straight into the generator with heavy outdoor extension cords. To power household circuits, have an electrician install a transfer switch. A generator plugged into a wall outlet sends power back through the transformer to the street. That back-feed can kill a line worker who is restoring your power.
Three Steps Once the Ice Stops
- Walk the property in daylight. Look up before each step, spot downed lines from a distance, and report them.
- Document the damage. Photograph the roof, cars, trees and the wire to the house before you move anything, since your insurer will ask.
- Clear the small limbs and book the big jobs. Rake up what you can lift, and call an arborist or electrician for anything bent, hung up or near a line.
Ice is one part of the winter season. Our full plan for how to prepare for a winter storm covers snow, cold and the rest of it.
