"Will it rain every day throughout July?" A rumor spread online recently suggesting that it would rain continuously for an entire month starting in July. Korea's weather agency quickly debunked the claim, pointing to a post back in April explaining that the rainy season is identified only after it has passed through observational data analysis. While the so-called "monsoon rumor" turned out to be false, there is little room for complacency as the rainy season approaches. Climate change is making heavier rainfall an unavoidable reality, not only in Korea but around the world. So how exactly is rainfall changing and what must cities do to prepare? More frequent cloudbursts driven by climate change According to the Korea Meteorological Administration's 113-Year Climate Change Analysis Report, released in December and covering the period from 1912 to 2024, Korea's annual precipitation has increased by an average of 17.83 millimeters per decade. The report also found clear increases in rainfall intensity, the number of heavy rain days and the frequency of hourly rainfall exceeding 50 millimeter