How to Build a Custom Emergency Kit for Your Family’s Specific Needs

Pre-made emergency kits are designed for a fictional average family. They assume two adults in reasonable health, no children under five, no pets, no chronic conditions, and no climate-specific hazards.

Your family is not that family.

If you have a child on a daily medication, a pet that travels with you, a family member with limited mobility, or a medical device that runs on electricity — a pre-made kit is a starting point, not a solution. This guide walks through the modifications and additions that make a kit actually work for your household.

Start with a Foundation, Then Customize

Building from scratch is harder than you think. The basics — water pouches, food bars, emergency blankets, basic first aid — are well-handled by any quality pre-made kit. Start there.

The Sustain Supply Co. Premium Emergency Kit is a solid foundation. It includes the first aid kit, emergency radio, water, food, and core gear that you’d otherwise spend hours sourcing. Then you add the custom layer on top.

What you’re customizing:

Medications and medical devices
Infant and young child supplies
Pet supplies
Climate-specific gear
Mobility and accessibility considerations
Storage and organization

Medications and Medical Needs

This is the most critical customization for most households, and the one most often neglected.

Prescription Medications

If anyone in your household takes a daily medication — blood pressure medication, thyroid medication, asthma inhaler, insulin, antiepileptics, mental health medication — that medication belongs in your emergency kit.

Practical approach:

Ask your doctor or pharmacist for an emergency supply. Many will provide a 7-day supply specifically for disaster preparedness, particularly for chronic conditions. Insurance coverage varies, but it’s worth asking.
If you can’t get a separate supply: keep an extra refill on hand by refilling prescriptions slightly early each month, accumulating a buffer of a few weeks’ supply
Store medications in a waterproof bag, labeled clearly with the name, dose, frequency, and prescribing physician’s name
Include a copy of the prescription — useful if you end up at a pharmacy far from home

Insulin and temperature-sensitive medications: Insulin can be kept at room temperature for up to 28 days once opened (verify with your pharmacist). For an emergency kit, an insulin cooler like the FRIO Insulin Cooling Wallet keeps it usable for 45+ hours with no electricity.

Asthma: Pack at least two rescue inhalers — one for the kit, one for everyday carry — plus a written action plan from your doctor.

Mental health medications: Include them. Missing doses of SSRIs, antipsychotics, or mood stabilizers during an already-stressful emergency is a compounding problem — not a lower priority.

Medical Devices and Power

If anyone in your household relies on a powered medical device — CPAP, oxygen concentrator, nebulizer, electric wheelchair, cochlear implant charger — the power outage scenario isn’t just inconvenient: it’s a medical issue.

CPAP users: A dedicated battery backup (ResMed compatible battery pack) provides 1–2 nights of use. Many CPAPs also run on 12V DC — a car adapter is a low-tech backup. Ask your doctor about tolerating one night without.

Oxygen concentrators: These draw serious power. Contact the manufacturer about portable backup options. Also contact your utility company — many maintain priority restoration lists for customers with life-support equipment.

Electric wheelchairs: A car charger or generator is the practical backup. Keep a manual chair accessible if available and if your loved one can use one.

Medical Documentation

Pack a one-page medical summary for each household member with:

Name, date of birth, blood type (if known)
Known allergies (medications and environmental)
Current medications (name, dose, frequency)
Chronic conditions
Primary care physician name and contact
Insurance information

Keep this in a waterproof document sleeve, separate from the rest of the emergency documents.

Infants and Young Children

Infants require more customization than any other household member — and their needs change fast as they develop.

Infant Formula and Food

If you formula-feed: stock a 72-hour supply minimum, ideally a week’s worth. Ready-to-feed formula requires no water (critical in scenarios where water may be compromised). Powdered formula requires measured clean water — in an emergency, have the water supply figured out before you depend on powdered formula.

Pack in the original sealed containers. Don’t pre-mix and store — formula mixed with water spoils quickly.

If your infant is starting solids: pouched baby food (the squeezable pouches) has an 18–24 month shelf life and requires no preparation. Stock a 72-hour supply.

Rotate formula and food every 3–6 months to stay within shelf life.

Diapers and Wipes

Stock a 72-hour supply — more if your child goes through them quickly (newborns vs. toddlers are very different). A pack of 30–40 diapers plus two full packs of wipes covers most situations. Add a small tube of diaper cream.

Factor in waste disposal — trash services may not run during an extended emergency. Pack a few extra waste bags.

Comfort Items

An unfamiliar, stressful environment is harder on young children when their comfort items aren’t there. Pack:

A familiar small toy or stuffed animal
A pacifier if your child uses one (plus a backup)
A familiar blanket or item that smells like home

These add minimal weight and make an enormous difference for a toddler who doesn’t understand why normal life has been disrupted.

Child-Specific First Aid

Standard first aid kits assume adult physiology. Add:

Children’s acetaminophen (liquid for under 6)
Children’s ibuprofen (liquid or chewable)
Children’s antihistamine
Pediatric dosing chart (download and print from the AAP or your pediatrician’s website)
Digital thermometer

Pet Supplies

Many evacuation shelters don’t accept pets. Plan for this possibility.

Food and Water

Stock 72 hours of pet food — the same shelf-life principles apply as human food. Dry kibble stores better than wet food and is more practical for an emergency bag. Pack in a sealed container or heavy-duty zip bag to prevent moisture and pest damage.

A collapsible pet water bowl takes up virtually no space and makes watering on the go practical.

Medications

If your pet takes daily medication (thyroid, epilepsy, heart medication, etc.), pack a 7-day supply. Same principle as human medications — label clearly, store in waterproof packaging.

Documentation

In evacuation scenarios, you may need to prove ownership and vaccination status to enter a pet-friendly shelter. Pack:

Vaccination records (rabies especially)
Current photo of your pet (for lost animal identification)
Your vet’s name and phone number
Any relevant medical history

Carriers and Leashes

Your emergency kit doesn’t need to contain a carrier — but your plan needs to include it. Know where the carrier is. Know how fast you can load a panicked cat or an excited dog. Practice is not too strong a word here.

Climate-Specific Customization

Where you live determines what emergencies you’re preparing for. A kit in Phoenix needs different items than a kit in Minneapolis or Houston.

Hot Climates and Heat Emergencies

Heat stroke and heat exhaustion are genuine medical emergencies. In hot climates:

Electrolyte packets: Hydration in heat requires electrolytes, not just water. Liquid IV or similar products add minimal weight
Battery-operated or hand-held fans: Not a luxury in 105-degree weather without power
Cooling towels: Evaporative cooling for heat management
Extra water: 1 gallon per person per day is FEMA’s minimum; in extreme heat, double it

Cold Climates and Winter Emergencies

Beyond the car kit winter additions:

Hand warmers: Disposable chemical hand warmers, multiple packs. Lightweight, effective, important for children and elderly family members
Extra insulating layers: Wool or synthetic base layers that stay warm when wet
Waterproof boot covers or spare waterproof boots
Emergency sleeping bag: If you might be sheltering in an unheated space, a compact emergency sleeping bag rated to 30°F or lower is worth the space

Wildfire Risk Areas

If you’re in a wildfire-risk zone (California, Oregon, Washington, Colorado, and other western states), add:

N95 masks (at least 10): Wildfire smoke is a genuine health hazard. Standard dust masks don’t cut it — you need N95 or better
Goggles: For smoke and ash environments
Local evacuation maps: Know your evacuation routes before you need them. Cell towers go down or get overloaded during evacuations

Flood and Hurricane Zones

Waterproofing: Keep everything in waterproof containers. The Pelican 1510 case or MARCHWAY waterproof dry bag protects contents from immersion
Extra water filtration: Flood water is heavily contaminated. The Sawyer filter addresses most biological concerns; add purification tablets as backup
Rubber boots: Wading through contaminated water with regular shoes is a health risk worth avoiding

Mobility and Accessibility

If a family member has limited mobility, uses a wheelchair, or has sensory impairments, your evacuation plan and kit both need to account for it.

Wheelchair users: Know which evacuation routes are accessible — some “routes” are stairwells. Notify your local emergency management office; many municipalities maintain special-needs registries for evacuation assistance.

Hearing impairment: Emergency communication plans should account for text-first contact. Ensure battery backup for cochlear implant chargers.

Visual impairment: Label emergency items with tactile markers. Know your kit’s organization by feel — practice accessing key items in the dark.

Storage and Power

Storage: Use the MARCHWAY Floating Waterproof Dry Bag for protecting documents and electronics within a larger bag. For home stay-put supplies: a labeled plastic bin by the garage door beats a buried bin in the back of the garage every time.

Power: The Anker PowerCore 26800 handles phones, tablets, and small electronics. For heavier power needs (CPAP, oxygen concentrator, nebulizer), you need a portable power station — covered in our power backup guide. Keep all batteries charged; top them off every 3 months.

Building Your Custom Kit: The Framework

Work through each category and add what applies to your household:

Step 1: Start with a pre-made foundation kit Sustain Supply Co. or equivalent. This covers the universal basics.

Step 2: Medications and medical devices

7-day supply of all prescription medications, labeled and waterproofed
Medical device power backup (if applicable)
One-page medical summary per household member
Copy of all prescriptions

Step 3: Infants and young children

72-hour supply of formula/food, plus a week’s worth if possible
72-hour supply of diapers and wipes
Children’s medications (acetaminophen, ibuprofen, antihistamine)
Comfort items (small toy, pacifier backup, blanket)
Pediatric first aid additions

Step 4: Pets

72-hour supply of pet food + sealed water for pets
Collapsible food and water bowls
Pet medications (7-day supply)
Vaccination records, current photo, vet contact info
Pet carrier or leash confirmed accessible

Step 5: Climate-specific items

Hot climate: electrolytes, cooling towels, extra water
Cold climate: hand warmers, extra insulation, emergency sleeping bag
Wildfire: N95 masks, goggles, evacuation maps
Flood/hurricane: waterproof storage, purification tablets, rubber boots

Step 6: Mobility and accessibility

Manual backup for powered mobility devices (if applicable)
Emergency plan accounts for mobility limitations
Communication methods for hearing/visual impairment
Local emergency management notification (if applicable)

Step 7: Power backup

Portable charger for phones and devices, fully charged
Heavy-duty battery backup for medical devices (if applicable)

Step 8: Documents

Waterproof document pouch with IDs, insurance, prescriptions, medical summaries
Pet documentation (vaccination, ownership proof)
Cash in small bills

Review Your Kit Annually

A custom kit has more expiration points than a standard one. Set a calendar reminder once a year to review:

Medication expiration dates and current prescriptions (medications change)
Formula expiration dates (if applicable — infants’ needs change fast)
Battery charge on all power devices
Child supplies updated for current developmental stage
Climate additions appropriate for the current season
Pet documentation current (updated vaccination records)

A kit built for a 3-month-old needs a complete refresh before that child turns one. A kit built without accounting for a newly diagnosed condition isn’t complete. Review annually at minimum, and update when your household’s needs change.

For the foundational kit that this guide customizes, see best pre-made emergency kits. For what to include in a go bag specifically, see our go bag essentials guide. And if you’re just getting started, emergency preparedness for beginners is the place to start.