Preparing Your Rental Home for Typhoons and Heavy Rain: A Practical Guide to Protecting Yourself and Your Property from Flooding
A practical guide to protecting your rental home from flooding caused by typhoons and heavy rain. We cover advance preparation, evacuation decision-making, what to do when damage occurs, and insurance claims—all essential knowledge for residents of lower floors and flood-risk areas.
Flooding caused by typhoons and heavy rain can be significantly reduced through advance preparation. While rental properties limit major building modifications, tenants can implement many effective countermeasures.
First, inspecting and organizing your balcony is the top priority. Bring potted plants, clotheslines, storage boxes, and other items that could scatter indoors or secure them firmly. If items scatter during a typhoon and break windows or damage lower floors or neighboring units, you may face liability for damages.
Checking drainage systems is also important. Ensure that balcony drains, AC unit drainage lines, and gutters near the entrance are not clogged with fallen leaves or debris. Poor drainage not only increases flooding risk but can also cause water leaks from upper floors.
Reinforcing windows by taping them in an X or grid pattern with painter's tape helps prevent glass from scattering. Keeping curtains or blinds closed also reduces the spread of broken glass if a window shatters. If you have storm shutters, always close them.
Prepare emergency supplies: at least 3 days of drinking water and food, a flashlight, portable charger, first aid kit, medications, cash (cashless payments won't work during power outages), and copies of important documents in waterproof bags. Copies of your lease agreement and insurance policy are especially crucial for handling damage claims.
Understanding Your Home's Risk with Hazard Maps
The first step in flood preparedness is understanding your home's level of risk. Be sure to check the hazard maps published by the Ministry of Land, Infrastructure, Transport and Tourism and your local municipality.
Hazard maps show flooding zones, landslide warning areas, and storm surge inundation zones in different colors. Most importantly, check the predicted inundation depth. These are labeled as "under 0.5m," "0.5–3.0m," "3.0–5.0m," etc., indicating up to which floor your home could be flooded.
If you live on the 1st or 2nd floor in an area with predicted inundation depths exceeding 1m, vertical evacuation (moving to upper floors) alone may be insufficient. Basement or semi-basement units are particularly dangerous—even 30cm of water can flood rapidly, and water pressure can jam doors shut.
Identify multiple evacuation sites and routes in advance. Don't rely solely on designated evacuation centers—also identify alternatives such as relatives' or friends' homes outside flood zones, elevated areas, or sturdy high-rise buildings. For peace of mind, walk the routes at night and in heavy rain conditions to confirm they're safe.
Hazard maps can be found on your city or ward's disaster prevention website or the Ministry of Land, Infrastructure, Transport and Tourism's "Hazard Map Portal Site." Bookmark these on your smartphone and share the information with your family.
When Flooding Begins: Evacuation Timing and Steps to Take
When a typhoon approaches or heavy rain warnings are issued, constantly monitor weather updates and local evacuation guidance. Missing your evacuation window is the most life-threatening mistake you can make.
Understand alert levels. At Alert Level 3 ("Evacuation recommended for elderly and vulnerable people"), elderly residents, people with disabilities, and households with young children should begin evacuating. At Alert Level 4 ("Evacuation order"), everyone should evacuate. At Alert Level 5 ("Emergency safety assurance"), disaster has already struck, making outdoor movement extremely dangerous.
Evacuate immediately if any of the following applies:
•Heavy rain special warnings are forecast for nighttime
Evacuating after flooding begins is extremely dangerous. Water deeper than 30cm makes walking difficult for adults, and at 50cm, car doors won't open. Manhole and drain covers may be invisible beneath water, creating fall hazards.
If you must stay indoors, implement vertical evacuation by moving to the 2nd floor or higher—preferably 3rd floor or above—away from the river on the opposite side of the building. Bring a flashlight, drinking water, food, and mobile phone in case of power outages.
Immediate Response When Damage Occurs: The Importance of Contacts and Documentation
If flooding occurs, follow these steps calmly.
Safety first. If electrical equipment is flooded, turn off the circuit breaker due to electrocution risk. If you smell gas, ventilate immediately and call your gas company. If the building is severely damaged, contact the management company and evacuate to a safe location due to risk of aftershocks or secondary disasters.
Next, document the damage thoroughly. Photograph and video your surroundings with your smartphone, recording the date, time, location, and nature of damage. Take photos with a measuring tape to show water height. This documentation is essential for insurance claims and support applications.
Contact the management company or landlord as soon as possible. Briefly explain when, where, and what damage occurred. Copy the emergency contact number from your lease in advance. Building damage (cracked walls, flooded floors, broken doors) is typically the landlord's responsibility to repair, so don't repair without permission.
Contact your insurance company promptly. If you have fire/household insurance with water damage coverage, your household contents may be covered. Provide your policy number, policyholder name, and damage details, and confirm required documents and procedures. Most insurers have dedicated disaster hotlines listed on their websites.
Household Insurance Coverage and Claims Considerations
In rental properties, the building itself is covered by the landlord's fire insurance, but your household contents are covered only by your own insurance. Check the terms of your fire/household insurance from when you moved in.
Check whether water damage coverage is included. Not all "fire insurance" plans automatically include water damage coverage. Review your policy documents for mentions of "water damage," "flooding," or similar terms. Without water damage coverage, typhoon and heavy rain flooding is not covered.
•Damage from normal wear and tear or deterioration
•Damage from gross negligence (e.g., forgetting to close windows)
•Jewelry, cash, and securities (unless covered by special rider)
•Vehicles (covered by auto insurance instead)
Insurance claim procedure:
Report the incident to your insurance company (by phone or online)
Submit photos and videos of the damage
Complete and submit the claim form
Submit repair estimates and receipts
Insurance company assessment
Payment of claims
Claims must typically be filed within 3 years, but earlier filing is recommended. After major disasters, claims are heavily backed up, so allow 1–2 months from initial contact to payment.
Cleanup After Typhoons and Using Public Support
Once the typhoon passes and safety is confirmed, begin cleanup carefully—always prioritize safety.
Before cleanup, check:
•Building safety (cracks, tilting)
•Electrical safety (wet outlets, damaged wiring)
•Gas leaks
•Hygiene conditions (contaminated water, sludge)
Flooded homes carry disease risks. Wear long sleeves, long pants, rubber gloves, boots, and a mask while cleaning. Promptly remove flooded tatami mats and carpets. Disinfect floors and walls with alcohol or bleach solution.
Follow local guidelines for disaster debris disposal. Temporary collections often supplement regular trash pickup. Some municipalities offer free recycling for appliances (refrigerators, washing machines, air conditioners, TVs) during disasters—check with your municipal disaster headquarters or sanitation office.
Government assistance programs are available:
•Disaster Victim Life Reconstruction Support: Up to 3 million yen for total loss or major damage
•Disaster Relief Law assistance: Evacuation centers and emergency temporary housing
•Disaster Welfare Loan: Up to 3.5 million yen in loans for injury or household property damage (income restrictions apply)
•Tax relief: Reductions in income tax, resident tax, and property tax
Proof of disaster (罹災証明書) is required for these applications. Apply at your municipal office and undergo damage assessment. Your earlier photos will serve as supporting documentation.
If your rental becomes uninhabitable, you may be able to negotiate contract termination or rent reduction. Start by contacting the management company, then utilize free legal consultations or consumer affairs centers if needed.
Typhoons and flooding occur annually. Use any disaster experience to strengthen your preparations for the next season and protect yourself and your family.
