When a weather headline mentions an atmospheric river, the most useful question is not “What category is it?” It is “What has to work at this address if heavy rain interrupts a normal day?” This checklist starts before an alert becomes urgent. If a warning, evacuation order, rising water, or unsafe access is already present, skip preparation and follow the current flood alert and evacuation plan.
For understanding forecast maps and experimental atmospheric-river scales, use the separate atmospheric-river forecast explainer. This page owns the household assignments, not weather interpretation.
About 48 hours before: make four decisions
- Where are current instructions? Save the local NWS forecast and alerts, county emergency-management alerts, and an offline contact number. Confirm the alert applies to your location and time.
- Where would you go? Identify one higher-ground destination and a second way to reach it before roads are affected. Do not use a digital map to justify entering a closed or flooded road.
- Who needs extra lead time? Arrange medications, powered care equipment, children, pets, mobility aids, and work or school pickups. Write who is responsible for each.
- Where does ordinary rain already cause trouble? From dry ground, record visible blocked surface drains, low driveway points, downspout discharge, or water against an exterior wall. Report public-drain problems rather than entering roads or opening covers.
The NWS flood-preparation guidance calls for understanding local risk, communication, supplies, and home preparation before a flood. None of these observations establishes that a basement, road, or slope is safe.
About 24 hours before: protect the household routine
| System | Safe check | Fallback if it fails |
|---|---|---|
| Alerts | Verify phone alerts and battery radio if available | Printed contact and official message route |
| Travel | Review school, work, care and pickup plans | Early relocation or alternate caregiver |
| Electricity | Charge essential phones and battery packs | Paper contacts; prearranged powered location |
| Water and food | Set aside drinking water and food requiring little preparation | A location outside the affected area |
| Home exterior | Check only accessible, safe-from-ground rain paths | Property manager, public works, roofer or drainage professional |
| Documents | Keep identification and essential records ready in a dry portable place | Protected offline copy |
Do not climb a wet ladder, go onto the roof, open an electrical panel, clear a storm drain in the roadway, or move heavy flood barriers as conditions deteriorate. A home-maintenance check becomes an emergency hazard when access changes.
When the forecast becomes a warning
Read the full NWS and local government message—not only the watch/warning headline. The affected location, issuing time, current roads and the instructions matter more than this article’s “48-hour” label.
- If ordered to evacuate, leave by the route officials direct; do not complete the checklist first.
- If floodwater covers a road, turn around. Never drive through it or past a barricade.
- If you see rapidly rising water, compromised ground, a debris flow, or water near electrical equipment, move to safety and contact emergency services or your utility from a safe place.
- Before flooding, households needing longer loading or transport time may choose a safer, earlier departure rather than waiting for the final order.
48-hour action card
| Decision or task | Owner | Complete by | Done or help needed |
|---|---|---|---|
| Current local alert source and contact | |||
| Destination, route and backup | |||
| Medication, pets, mobility and care | |||
| Charging, lighting and communications | |||
| Safe ground-level drainage observation | |||
| School/work pickup and early-departure trigger |
Copy the table to paper. Keep only household-safe tasks on it. Professional roof, drainage, electrical and structural work belongs on a separate service list, not a last-minute DIY checklist.
Once the card is assigned, the single next action is to review your local alert now. NWS flood safety and local instructions supersede this plan.