When the internet goes down, only the content already on your device remains accessible — here is what to download, why it matters, and how to manage the storage.
Modern smartphones are extraordinarily capable emergency tools — but only when loaded with content that works without a network connection. When a crisis knocks out internet infrastructure, the apps that rely on cloud connectivity become useless. The apps, maps, guides, and documents you downloaded before the crisis become invaluable.
This article covers exactly what to pre-load, how to do it, and the management considerations to keep your offline library useful and current.
The failure modes for internet connectivity during a crisis are numerous:
| Crisis Type | Internet Impact |
|---|---|
| Power outage | Home Wi-Fi down immediately; mobile data fails when cell tower batteries drain (4–8 hours) |
| Major flood or earthquake | Physical cable and cell infrastructure damage; outages last days to weeks |
| Cyberattack on infrastructure | Internet connectivity may be deliberately disrupted |
| Mass evacuation event | Cell networks overloaded and unusable for data |
| Government communications blackout | Restricted in some conflict or civil unrest scenarios |
In each scenario, anything requiring a live internet connection fails. Everything pre-downloaded continues working.
⚠️ Do not wait for a warning before downloading offline content. Warnings come with little notice, and mobile networks become massively congested as millions of people simultaneously try to download the same maps and guides. Build your offline library on a clear, calm day.
Navigation is one of the most critical offline capabilities. When roads are blocked, you need to find alternate routes. When you are evacuating somewhere you have never been, you need reliable navigation without cell service.
Google Maps Offline:
Maps.me (MAPS.ME):
Gaia GPS:
OSMAnd:
Recommendation for most people: Download your home region and any likely evacuation destination areas in both Google Maps and Maps.me (the two systems complement each other).
Access to first aid information when you cannot search online could save a life.
British Red Cross First Aid app: Includes step-by-step illustrated guides for common emergencies — CPR, choking, burns, fractures, severe bleeding. Works fully offline once downloaded.
American Red Cross First Aid app: Similar comprehensive offline guide with video instructions.
Pocket First Aid & CPR (Jive Media): Compact, clear, fully offline first aid reference.
Where There Is No Doctor (Hesperian): Free PDF download — the definitive medical reference for communities without access to healthcare infrastructure. 400+ pages covering diagnosis and treatment.
Wilderness Medicine (Auerbach's): For detailed medical reference during extended off-grid scenarios.
Download at least one comprehensive first aid app and save the PDF versions of key medical references to your device's local storage.
If you may need to communicate in another language during an emergency (international travel, cross-border evacuation, large-scale displacement):
Google Translate Offline Language Packs: Open Google Translate → tap a language → download icon. Each language pack: approximately 50–200MB.
Recommended language packs to pre-download:
Paper documents can be lost, damaged by water, or left behind in a rapid evacuation. Digital copies on your device survive as long as the device does.
Documents to photograph and save locally (not just in cloud):
How to save locally: Use a note-taking app that stores offline, or save photos directly to the camera roll with a clear naming convention. For added security, encrypt with a password.
Password manager with offline access: Apps like 1Password and Bitwarden can store and access passwords offline. Ensure your vault is set to sync and is accessible offline — this is a setting, not the default.
During extended crisis situations, particularly in shelters or while waiting, boredom and anxiety compound psychological stress. Pre-downloaded entertainment provides critical relief:
Spotify / Apple Music / YouTube Music: All support offline downloads for premium subscribers. Download playlists before any potential disruption.
Audiobooks and podcasts: Audible, Libby (library app), and major podcast apps all support offline downloads. Download several before any event.
Children's apps: Offline games, drawing apps, educational apps. Remove internet-dependent games that will simply show error screens. Curate several fully offline games on any child's device.
eBooks: Kindle, Apple Books, and Kobo all support offline reading. Download several books per device.
Morale support for children is not a luxury — it is a significant factor in how well families manage extended crisis situations.
The entire English Wikipedia — approximately 85 gigabytes of articles, or a compact "no pictures" version at approximately 20GB — can be downloaded for completely offline access via the Kiwix app.
Kiwix is transformative for emergency preparedness:
The "Wikipedia English (text only)" download is approximately 20GB and contains all articles without images. An external storage card or tablet with adequate storage makes this practical.
Even the Wikipedia "medical articles" subset (1–2GB) is a valuable emergency download.
Do not plan to access these during an outage:
Pre-loading all this content requires significant device storage. Practical management:
| Content | Approximate Storage |
|---|---|
| Offline maps (1 country or 2–3 cities) | 1–5 GB |
| Wikipedia (text only, English) | 20 GB |
| First aid apps + medical PDFs | 500 MB |
| Translation language packs (5 languages) | 1 GB |
| Downloaded music (1,000 songs) | 3–5 GB |
| Audiobooks (10 books) | 500 MB – 1 GB |
| Children's offline apps and games | 1–3 GB |
| Document photos | 200–500 MB |
| Total | 27–37 GB |
This fits comfortably on a 64GB or 128GB device with room for normal use. If your device is 32GB, prioritise maps, first aid content, and critical documents.
Refresh schedule: Set a calendar reminder quarterly to:
| Priority | Download | App |
|---|---|---|
| Critical | Offline maps of your region | Google Maps + Maps.me |
| Critical | First aid guide | Red Cross First Aid app |
| Critical | Device documents | Camera roll / encrypted notes |
| High | Offline translation | Google Translate language packs |
| High | Critical reference | Kiwix + Wikipedia |
| Medium | Entertainment for children | Curated offline games |
| Medium | Music and audiobooks | Spotify / Audible offline |
| Medium | Password access | 1Password / Bitwarden with offline vault |
The fundamental principle: anything you might need during a crisis, download before the crisis. The 2–3 hours spent building an offline library today is preparation that costs nothing to deploy and can make an enormous difference when infrastructure fails.
Take Offline Digital Preparedness — What to Download Before a Crisis with you — no internet needed when it matters most.
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