A promotional poster for the "Floating Stage Water Festival" / Courtesy of the Seoul Metropolitan Government Urban rivers are usually reserved for scenic strolls or sunset picnics, but Seoul's municipal planners are taking a decidedly more hands-on approach to beating the early summer heat.As temperatures climb and summer settles over the city, the Seoul Metropolitan Government is turning the banks of the Han River into a sprawling oasis. This Saturday, the city’s Future Han River Headquarters will host the 2026 Floating Stage Water Festival at Yeouido Hangang Park. The seven-hour event is designed to transform the popular public waterfront into an interactive, all-ages playground where families can cool off.Rather than relying on standard city park sprinkler pads, the festival introduces heavy-duty infrastructure to maximize the splash factor. The venue's dedicated Water Zone features massive swimming pools, towering water slides, giant water rollers and a stylized fishing pool to keep visitors cool and safe. To make sure that nobody stays dry, municipal staff will coordinate recurring water cannon blasts, foam play areas and organized water gun fights throughout the afternoon.But the event is as much a cultural showcase as it is a public cooling center, combining hands-on activities with live programming.In the adjacent Performance Zone, Hexia, a professional K-pop dance outfit, is scheduled to perform synchronized routines and lead the crowd in dance challenges. As the sun sets, DJ Somi will spin electronic dance music and pop tracks with water cannons firing in sync.City officials note that the festival reflects a broader shift in local leisure culture, moving toward interactive experiences that encourage direct civic participation. By blending public infrastructure with live performances, municipal officials hope to establish the waterfront as a premier urban destination.The festival gates open at 11 a.m. and stay open until 6 p.m.. While eager locals can register in advance through the festival's online reservation portal, the city is also leaving room for on-site registration on Saturday. For a capital facing a humid summer, Seoul is sending a clear message: Grab a towel and jump in.This article was published with the assistance of generative AI and edited by The Korea Times.