Solar Storm Preparation: Protect Power and Communications

Preparing for a solar storm helps you manage a temporary loss of electricity, mobile service, internet, GPS, or radio communications. You cannot prevent a storm or predict exactly how it will affect your area, but you can make a household plan, gather basic supplies, and know where to get reliable updates.

What You’ll Need

• Several days of drinking water, shelf-stable food, and any essential supplies your household routinely uses.
• Flashlights or battery-powered lanterns, spare batteries, and a battery- or hand-crank radio.
• A charged power bank and charging cables; a car charger can be useful if you have a vehicle.
• A written list of emergency contacts, meeting places, and important information, plus some cash in small bills.
• Basic first-aid supplies and a plan for anyone who relies on powered medical equipment.

Step-by-Step

1. Understand the likely effects. A strong geomagnetic storm can disturb the upper atmosphere and affect some satellite operations, high-frequency radio, navigation signals, and electrical-grid equipment. The effects vary by storm strength, location, infrastructure, and duration. A disruption does not mean every phone, satellite, or power line will fail. Prepare for a broader outage, but use official local alerts to guide your response.
2. Choose your information sources before an alert. Identify your local emergency-management agency, weather service, utility outage page, and public broadcaster. Bookmark their pages and learn how they send alerts. Keep a battery-powered or hand-crank radio available because internet and mobile networks may be unreliable. Check information against official sources; avoid forwarding dramatic claims or unverified forecasts.
3. Make a household communications plan. Agree on an out-of-area contact, a nearby meeting place, and a backup meeting place. Write down phone numbers and addresses; do not rely on a phone’s contacts alone. Decide how household members will check in if calls fail. Text messages may sometimes get through when voice calls are congested, but neither is guaranteed. Include arrangements for children, older adults, neighbors who may need help, and pets.
4. Prepare for a power interruption. Store lights where you can find them in darkness, and test your radio and spare batteries. Charge phones and power banks when a storm watch is issued, and keep cables together. If you have a generator, read its manual and arrange safe outdoor use well away from doors, windows, and vents; never run it indoors, in a garage, or near an opening. Do not connect a generator directly to home wiring unless a qualified professional has installed the proper transfer equipment.
5. Plan for water, food, and essential needs. Keep water and foods that need little or no cooking, along with a manual can opener. Store supplies in a cool, accessible place and rotate them before they expire. Consider how you would manage refrigeration, sanitation, mobility needs, and temperature control during an outage. Keep essential medicines and medical supplies in their original packaging and follow their storage instructions. Ask a health professional or equipment provider about a power backup plan for powered medical devices; do not wait for an outage to resolve this.
6. Protect electronics and important information. Back up important files regularly to a separate device or a service that can be accessed later, and keep copies of key documents somewhere secure. When authorities or your utility advise that a severe event is imminent, unplug nonessential sensitive electronics if it is safe and practical. A surge protector can help with some ordinary electrical surges, but it cannot guarantee protection from a geomagnetic disturbance or a grid outage. Avoid risky last-minute wiring or improvised grounding.
7. Review travel and navigation alternatives. Do not assume GPS will be accurate or available during a disturbance. Download maps for offline use, note routes to essential destinations, and keep a paper map if practical. Check transport and flight updates through official operators before travelling. If communications are disrupted, avoid unnecessary trips and follow local instructions.
8. Use alerts to adjust your plan. During a watch or warning, charge devices, keep the radio accessible, check on household members, and follow utility and emergency-management advice. If power goes out, use flashlights instead of candles where possible, keep refrigerator and freezer doors closed, and report outages through the utility’s available channels. Conserve phone battery by lowering screen brightness and limiting nonessential use.
9. Resume normal activity carefully. Wait for utility or emergency officials to say conditions are safe. Treat downed power lines as live and stay well away; report them to the utility or emergency services. Do not enter flooded areas or touch damaged electrical equipment. Check food safety using local public-health guidance, and discard items that may have become unsafe rather than tasting them.

Common Mistakes

• Assuming every forecast means a blackout. Space-weather forecasts describe risk, not certainty. Follow local alerts and prepare proportionately instead of making unnecessary purchases or travel decisions.
• Relying on one device or network. A phone is useful but may lose power, signal, or access to online information. Pair it with a radio, written contacts, and an agreed meeting plan.
• Using a generator or fuel-burning appliance indoors. This can cause fatal carbon-monoxide poisoning. Generators belong outdoors, positioned well away from openings, and used according to the manufacturer’s instructions.
• Assuming a surge protector or unplugging everything guarantees safety. No household measure can guarantee protection from grid impacts. Follow utility advice and prioritize safe, practical actions.
• Waiting until an alert to make a plan. Batteries, supplies, and family arrangements are easier to check ahead of time. Review them periodically and replace used or expired items.

Tips

• Keep a small outage kit in a place everyone can locate, and show household members how to use the radio and flashlight.
• Store some supplies for people with specific needs, including infants, pets, or mobility limitations.
• Keep power banks charged, but do not store lithium batteries in extreme heat or use damaged batteries or cables.
• Ask your electric utility whether it offers outage alerts or a process for customers who depend on electricity for critical equipment.
• Make a short paper checklist of the actions to take when an alert arrives; stress and poor connectivity can make it harder to remember details.

Troubleshooting

• Your phone has no service: Try text rather than repeated calls, move to a safe location with better reception, and check the radio for public instructions. Do not travel into hazardous conditions just to find a signal. Use your agreed meeting plan if contact remains impossible.
• The power is out longer than expected: Contact the utility only through its official outage channel if available. Conserve batteries, keep refrigerator and freezer doors closed, and relocate to a designated public shelter if the home becomes unsafe or essential needs cannot be met.
• Your radio receives no useful updates: Check the batteries, antenna, and tuning, then try the frequencies or channels listed by local authorities. If reception remains poor, use another official source when available and ask a nearby emergency facility for guidance.
• A generator will not start or seems unsafe: Turn it off and follow its manual; do not modify wiring or refuel a hot generator. If you smell fuel, see damaged wiring, or suspect carbon monoxide, move away, get outside, and contact emergency services as appropriate.
• You have no backup for a powered medical device: Contact the device supplier, care team, or local emergency service promptly. If the device is essential and power cannot be restored, follow the person’s established medical emergency plan rather than improvising a power source.

Frequently Asked Questions

Can a solar storm knock out all electricity?
No. Effects depend on storm conditions and grid characteristics. Some areas may experience no noticeable impact, while others may face equipment stress or outages.

Will my phone stop working?
Not necessarily. Mobile service could be affected by power loss, network congestion, or related infrastructure issues. Keep it charged and have a non-phone way to receive updates.

Should I unplug my electronics?
Follow utility and emergency-management instructions. Unplugging nonessential equipment may be a reasonable precaution when advised, but it does not guarantee protection and should never involve unsafe electrical work.

How much emergency food and water should I keep?
Follow your local emergency agency’s household guidance, which may account for climate and services in your area. Include the needs of every person and pet, and rotate stored supplies.

Can I rely on GPS during a solar storm?
Navigation signals may be less reliable during some disturbances. Keep offline maps or a paper map and verify important routes with current local information.

Where can I get dependable updates?
Use your national or regional space-weather service for storm information, and local emergency management, public broadcasters, and your electric utility for practical local instructions.

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