Blizzard & Snowstorm Power Outage Guide

A blizzard power outage isn’t like losing power on a calm summer evening. When heavy snow, ice, and wind combine, what begins as a short disruption can stretch into a multi-day winter emergency. Without electricity, you may also lose heat, access to water (if on a well), communication, and the ability to safely store food.

At PowerOutage.us, we track outages across 950+ utilities serving more than 200 million customers. This provides near-real-time visibility into outage scale and restoration during events like the winter storm Elliott in December 2022, which left 6.3 million U.S. households without power at some point across 36 states. Read on to learn how to prepare and stay safe in a situation like this.

What to do before a blizzard power outage

Prepare before the storm arrives because restoration may take days when snow and wind block crews.

Charge and fuel everything:

• Fully charge all phones, tablets, laptops, and any backup power banks or portable power stations
• Fill your vehicle's gas tank; gas stations may lose power or run out of fuel during a widespread event
• If you use a generator, check and top off fuel, and test-run it before the storm

Stock essentials:

• Store at least one gallon of water per person per day for a minimum of three days, ideally two weeks, for a severe storm scenario
• Stock non-perishable food items that require no cooking or minimal preparation
• Fill prescriptions and stock at least a 7-day supply of critical medications
• Prepare pet food, water, and any pet medications

Protect your home:

• Know where your main water shutoff is located in case pipes freeze or burst
• Insulate exposed pipes in unheated spaces like garages and crawlspaces
• If you rely on a well pump (which requires electricity to operate), store extra water now

Prepare communication and alerts:

• Sign up for local utility outage alerts and your county's emergency notification system
• Download a NOAA weather radio app or purchase a battery-powered NOAA weather radio from brands like Midland or Eton
• Know the difference between a winter storm watch (conditions may develop), winter storm warning (severe conditions expected), and blizzard warning (sustained or frequent winds of 35+ mph with blowing snow reducing visibility to less than ¼ mile for at least 3 hours); NOAA provides official definitions at weather.gov
• Identify your nearest warming center by contacting your local emergency management office

Plan for vulnerable household members:

• If anyone in your household uses a CPAP, home oxygen, electric wheelchair, or refrigerated medication like insulin, make a specific plan for powering that equipment; a small power bank will not be enough for most medical devices
• Plan for infants, elderly residents, and anyone who cannot self-regulate body temperature effectively
• Create a medical device outage checklist to follow a process for backup power or moving locations to maintain important devices

What to do during a snowstorm power outage

When the power goes out during a blizzard or heavy snowstorm, your first priority is maintaining safe indoor temperatures and conserving everything you have.

Preserve heat:

• Close off unused rooms to concentrate heat in the areas where your household is gathered
• Hang blankets over doorways and tape draft guards under exterior doors to reduce cold air infiltration
• Layer clothing, including hats and wool or fleece socks, especially for children and elderly household members
• The minimum safe indoor temperature for most adults is around 55°F; for infants and elderly residents, that threshold is higher

Protect food and appliances:

• Keep the refrigerator and freezer closed as much as possible; every opening releases cold air
• A full freezer stays at a safe temperature for approximately 48 hours; a half-full freezer for about 24 hours
• A refrigerator holds safe temperatures for about 4 hours without power if unopened

Light and communication:

• Use flashlights and battery-powered lanterns; candles are a significant fire risk, especially when placed near blankets or curtains used for insulation
• Conserve phone battery by reducing screen brightness, disabling Wi-Fi and Bluetooth when not in use, and closing background apps
• Check in on neighbors, particularly elderly or isolated residents, at least once during a multi-day outage

Monitor the situation:

• Use PowerOutage.us to monitor the scale of the outage and check restoration estimates for your utility; the platform refreshes data every 10 minutes during live events
• Follow local emergency management and utility alerts for restoration updates and any evacuation or warming center guidance

What to do after power returns

Restoration is not the end of the process:

• Check the fridge and freezer first: Any refrigerated food that has been above 40°F for more than 4 hours should be discarded; any freezer food that has thawed and re-frozen should be evaluated carefully (use the USDA food safety guidelines)
• Reset thermostats and heating systems gradually: Rapid reheating can stress pipes that have been near freezing
• Check for pipe damage: Even if pipes didn’t burst, they may have hairline cracks that become leaks as they thaw
• Restock your kit: Replace used water, food, batteries, and medications before the next storm season
• Review what worked and what failed: Did you have enough water? Was your backup power sufficient? Was communication reliable? Adjust your plan accordingly
• Check on neighbors: Restoration is often uneven; your power may return hours or days before a nearby household

Winter storm power outage: real events tracked by PowerOutage.us

The scale and duration of winter outages vary significantly depending on storm intensity, geography, and infrastructure condition. During Winter Storm Fern (January 24–26, 2026), PowerOutage.us tracked more than 1 million customers without power at peak, with Tennessee (306,700 customers), Mississippi (175,300), and Louisiana (145,100) among the hardest-hit states. Some areas remained without power for more than 6 days as ice accumulation brought down trees faster than crews could respond across a 2,000-mile storm area from Texas to New England. The platform tracked outages continuously through February 7 as recovery stretched into a second week in parts of northern Mississippi.

Winter Storm Elliott (December 2022) affected 6.3 million U.S. households across 36 states during a Christmas week bomb cyclone with wind chills below -50°F in parts of the country. Winter Storm Uri (February 2021) saw 4.8 million customers lose power as the Texas grid came within minutes of total failure, with cascading pipe bursts and boil water notices affecting millions more. These events share a common pattern visible in PowerOutage.us data: the outages that cause the most harm are the ones that last longest, and blizzards, snow, and ice storms are among the most likely to produce extended, multi-day outages.

Safe heating and carbon monoxide guidelines

Carbon monoxide is one of the most serious risks during a blizzard power outage or snowstorm power outage. Many winter outage injuries and deaths happen because people try to heat enclosed spaces with unsafe fuel-burning equipment.

Never use these indoors:

• Grills
• Camp stoves
• Gas ovens for heat
• Portable generators

Generator placement rules:

• Maintain distance from doors, windows, and vents (CDC recommends 20 feet while CPSC recommends 25 feet)
• Exhaust directed away from the home
• Follow CPSC safety guidance

CO detectors:

• Install battery-powered units on every level
• Leave immediately if an alarm sounds

Space heaters:

• Use indoor-rated models only
• Maintain at least 3 feet of clearance

Water and pipe safety during a blizzard outage

Food, water, and plumbing problems are common during a blizzard power outage, especially when homes lose both electricity and heat. If your house uses a well pump, a snowstorm power outage can also stop running water completely.

• Fill bathtubs for sanitation use before the outage if a storm is approaching
• Treat melted snow before drinking; snow is not automatically safe to consume

Frozen pipes:

• Let faucets drip during very cold periods if water service is still active
• Open cabinets under sinks to allow warmer air to reach plumbing
• Use warm air or warm towels to thaw pipes; never use an open flame

If temperatures inside the home keep falling during a winter outage, pipe damage becomes more likely. Shut off the main water line if you think pipes may burst and you can’t keep the house warm enough.

Backup power options for snowstorm outages

Choosing backup power for a blizzard power outage depends on what you need to run, how long you need to run it, and whether you can safely store fuel. These options are not equal — a phone power bank can’t run a refrigerator, and a small portable power station can’t replace a generator for many homes during a long snowstorm power outage.

Choose a generator if your home depends on a well pump, you heat with electric resistance, or you need to power multiple major appliances at the same time during a multi-day blizzard power outage.

A portable power station makes more sense when you live in an apartment, need to run a CPAP or refrigerated medication overnight, want an indoor-safe backup source, or need something you can recharge from a car outlet or solar panel during a snowstorm power outage.

Installing a home battery backup is a large expense, but it can be useful during an outage. If you can combine it with a solar panel setup that also supports off-grid islanding, you can charge the battery during an outage.

Lastly, if your home relies on an electric furnace, neither a portable power station nor a small generator will usually provide enough wattage to run it. Plan for another safe heat source, like a wood stove or properly vented propane wall heater, or identify a warming center before the winter outage starts.

Emergency kits: what they do and don’t cover

Power outage emergency kits can help you respond faster to a blizzard power outage, especially if you are starting with no stored supplies. For many households, a ready-made kit is a useful first step, but it will not fully cover a long snowstorm power outage.

Ready-made kits can help with:

• Starting from zero
• Apartments or limited storage
• Vehicle emergency use during winter travel

Limitations:

• Often insufficient water for a multi-day winter outage
• Limited warmth supplies for prolonged cold
• No meaningful backup power for a blizzard outage

They are a starting point, not a complete winter outage plan. Most households still need to add water, cold-weather gear, batteries, medications, and a real backup power source.

Why winter storm outages can last long

Winter outages are extended not by a single failure, but by compounding physical constraints:

• Snow loading: Wet snow adds weight to trees and lines, causing breakage
• Ice accumulation: Ice increases line weight and causes sagging or snapping
• Wind-driven damage: Wind distributes failures across large areas simultaneously
• Access limitations: Snow and ice delay repair crews, especially in rural areas
• Cold-related slowdown: Equipment efficiency drops and crews must work in shorter cycles

This combination means repairs have to be distributed across hundreds or thousands of issues, it isn’t just one fix at a time.

During Winter Storm Fern, utility crews described trees falling on power lines over and over, which shows why blizzard outages resist fast repair. A single downed line is a two-hour job. Hundreds of downed lines require much more time to coordinate and repair.

When to leave home during a snowstorm power outage

Staying home is usually the right decision during a blizzard outage, but there are thresholds that require you to leave:

• Indoor temperature falls below 55°F and you have no safe heat source
• A household member depends on electric medical equipment (like home oxygen or an IV pump) that can’t be powered by the available backup
• Pipes have burst and water is actively damaging the structure
• Your utility or local emergency management issues an evacuation order or opens mandatory warming centers
• You have infants, elderly residents, or medically fragile household members who cannot safely maintain body temperature

When you do leave, tell someone where you are going. Bring medications, phone chargers, warm layers, important documents, and enough food and water for at least 24 hours. Locate your nearest warming center in advance by checking with your county emergency management office or calling 211.

Two-week blizzard outage kit checklist

Here’s a quick blizzard-specific kit that goes beyond the standard 72-hour emergency list. Use this as a planning baseline:

Water:

• 1 gallon per person per day for 14 days minimum
• Water purification tablets as backup

Food:

• Non-perishable items with no cooking required or minimal prep
• Manual can opener
• Camp stove rated for outdoor use and fuel supply (outdoor use only)

Warmth:

• Warm base layers, mid-layers, and a heavyweight outer layer per person
• Wool or fleece socks and hats
• Sleeping bags rated for below-freezing temperatures
• Mylar emergency blankets

Health and medical:

• 14-day supply of all prescription medications
• First aid kit (include cold/flu medications, fever reducers, and hand sanitizer)
• Backup power plan for CPAP, home oxygen, insulin, or other electric medical equipment

Communication:

• Battery-powered or hand-crank NOAA weather radio
• Extra batteries in all common sizes (AA, AAA, 9V)
• Portable phone charger or power station
• Written list of emergency contacts and important account numbers

Sanitation and hygiene:

• Wet wipes, hand sanitizer
• Toilet paper
• Portable camp toilet option if sewer/septic access may be lost

Lighting:

• Flashlights (one per person)
• LED lanterns
• Extra batteries

Documents and finance:

• Copies of insurance cards, prescriptions, and ID in a waterproof envelope
• Cash in small bills; ATMs and card readers require power

Household and vehicle:

• Snow shovel and ice melt
• Jumper cables or a portable car jump starter
• Tire chains, if appropriate for your vehicle and region

Pet supplies:

• Food, water, medications, carrier

Entertainment for children:

• Books, card games, and non-electronic activity items

Quick recap

Blizzard outages are survivable with preparation. Households that prepare early (storing water, protecting pipes, planning for medical needs, and securing backup power) face less risk. Use tools like a NOAA radio and PowerOutage.us to stay informed and make decisions.