Communication When You Didn't Prepare

Assess your situation

• Are you physically safe where you are? If not, move first.
• Is anyone nearby injured and in need of immediate help? Direct physical aid comes before communication.
• What do you actually know? Before reaching out, take 60 seconds to assess: your location, what you can see, who is with you, what you need.

Preserve your phone battery

Your phone is your primary communication tool and its battery is finite. Extend it immediately:

1. Enable low power mode now, before the battery drops
2. Turn off WiFi, Bluetooth, and background app refresh
3. Reduce screen brightness to minimum usable level
4. If you have a car, a power bank, or any charging source — start charging immediately. Don't wait until the battery is low.

Text before you call

1. Send a short SMS text to your primary out-of-area contact: your location, your status (“OK” or “need help”), and who is with you
2. An out-of-area contact (someone in a different city or region) is more reachable than local contacts, whose networks face the same congestion yours does
3. If SMS fails, try a messaging app: WhatsApp and Signal messages queue and retry on weak connections where calls will not connect
4. Keep messages short. “At 45 Maple St, OK, dog and neighbor Maria with me” is enough.

Use WiFi calling if cellular voice is congested

If your home or a nearby building still has power, the router may still have internet access even if cellular is congested. WiFi calling routes voice calls over the internet instead of the cellular network:

• On iPhone: Settings → Phone → Wi-Fi Calling → On. On Android: Phone app → Settings → Calls → Wi-Fi Calling (varies by manufacturer)
• This is most useful in the first hour when cellular voice is congested but internet backhaul is still intact

If you have an iPhone 14 or later

Apple added Emergency SOS via Satellite on iPhone 14 and later hardware (not earlier models, regardless of iOS version). This is for genuine emergencies only — it connects directly to emergency services via satellite when cellular is unavailable:

• Hold the side and volume buttons to trigger Emergency SOS, then follow the on-screen satellite signal prompts. You need a clear view of the sky.
• Available in the US, Canada, and most of Western Europe. Coverage varies — check whether this feature is active in your country before you need it.
• This is for life-safety emergencies. Do not use it for status check-ins when other options exist.

Find physical information points

In a major disaster, official emergency management typically establishes physical locations for information and resources. These work without any communication infrastructure:

• Emergency shelters — schools, community centers, and religious institutions are common shelter locations. Staff at these points have current information.
• Fire stations and police stations — typically remain operational on generator power and have radio contact with the wider emergency management system
• Hospitals — have backup power and communication. Go only if you have a medical need; hospitals are overwhelmed in major disasters.

Look for community mesh networks

In some areas, community members have pre-deployed Meshtastic or other mesh networks that operate without internet or cellular. The Meshtastic app requires a physical radio node to connect to — a phone alone is not enough. But if you or someone nearby already owns a Meshtastic radio:

1. Download the Meshtastic app (available on iOS and Android)
2. Connect to the radio node via Bluetooth or USB. The node relays your messages across the mesh without any internet or cellular connection.
3. If the node is already configured on a community channel, you can send and receive text messages across the mesh immediately

If no one in your immediate area has a node, this option is not available to you. See Meshtastic technology overview →

Amateur radio nets

If you happen to own an AM/FM radio, a weather radio, or a car with a working radio, tune to local emergency broadcasts. In many areas, amateur radio operators run information nets on local repeater frequencies during disasters — you can listen without a license. You cannot legally transmit without one, but listening costs nothing and can provide current situational information.

• NOAA weather radio (US, 162.400–162.550 MHz) provides official emergency alerts with a dedicated battery-powered weather radio receiver
• Local AM stations often switch to emergency programming during major disasters and can reach you even without internet

Tell people what you know — physically

Information shared in person travels further and faster than most people expect. If your block or building has a gathering point (a lobby, a yard, a street corner), go there. Tell people:

• What you have observed (damage, hazards, road conditions)
• Where you found information (which shelter is open, which road is passable)
• What resources you know are available

This is how communities with no radio infrastructure still coordinate. The Red Hook, Brooklyn response after Hurricane Sandy relied heavily on physical information sharing before the mesh network was operational. See the Red Hook case study →

Mark your status if you are leaving your home

If you are evacuating, leave a note on your door so neighbors and anyone checking on you know your status. Tape a piece of paper with: your name, who is with you, where you are going, and when you left. This costs nothing and eliminates uncertainty for people trying to find you.

Check on isolated neighbors

Elderly neighbors, people with disabilities, and people who live alone are at the highest risk in disasters and the least likely to have communication infrastructure. Physically checking on the people nearest to you is one of the highest-value actions available to someone without radio equipment.