Leakage of Container Houses in Rainstorms

The main reason for the leakage of container houses in rainstorms is their insufficient rainproof and disaster-resistance capabilities, which stems from the decision during the event preparation stage to abandon the construction of a dedicated athletes' village to cut costs and instead adopt solutions such as container houses, coupled with resource constraints due to the actual number of registrants exceeding expectations.

I. Direct Cause: Insufficient Rainproof and Disaster-Resistance Capabilities During the rainstorm in Nagoya, the leakage problems of container houses were mainly manifested as rainwater seeping in through wall cracks, dripping from ceiling seams, and leaking from sink pipes. This exposed the structural defects of container houses under extreme weather conditions:

1. Poor Sealing: When container houses are transformed into residential units, if professional waterproofing treatments are not applied to wall seams, door and window edges, and other areas, rainwater can easily infiltrate the interior through gaps.
2. Weak Drainage System: The leakage of pipes beneath sinks indicates that the drainage pipes may not have been made of leak-proof materials or installed improperly, leading to rainwater backflow or pipe breakage.
3. Defects in Roof Load-Bearing and Drainage Design: Dripping from ceiling seams may be caused by insufficient drainage slopes on the roof or clogged drainage outlets, resulting in rainwater accumulation and subsequent infiltration into the interior.

II. Root Cause: Budget Control and Resource Constraints

1. Cost-Cutting Leading to Compromised Solutions: To save money, the organizing committee abandoned the construction of a dedicated athletes' village and instead adopted low-cost solutions such as cruise ships, container houses, and scattered hotels. Although container houses are easy to set up, their rainproof and insulation capabilities are far inferior to those of traditional buildings, and high-standard waterproof materials may not have been used during the renovation process due to cost constraints.
2. Unexpected Increase in Actual Numbers Exacerbates Problems: Originally planned to accommodate more than 2,000 people, the actual number of registrants exceeded expectations, leading to tight accommodation resources. Some container houses may have undergone rushed construction or reuse without rigorous quality inspections, further reducing their rainproof capabilities.

III. Event Impact and Warnings This incident not only caused property damage to athletes and staff (such as soaked mattresses and moldy corners) but also exposed the risk of "prioritizing cost over quality" in event preparation. Future similar events need to balance budget and safety, such as:

• Conducting extreme weather simulation tests on temporary buildings;
• Clearly defining performance standards for rainproofing and drainage and enforcing mandatory inspections;
• Reserving emergency accommodation resources to cope with fluctuations in the number of people.