INTERACTIVE: Hotter cities, heavier storms
By SHYAFIQ DZULKIFLI PETALING JAYA: The hotter it gets, the harder it rains. In urban areas such as the Klang Valley, experts say this is increasingly the reality. They say rising temperatures, combined with rapid development and climate change, are intensifying thunderstorms, increasing the risk of flash floods in cities. One reason for the rising heat is the Urban Heat Island (UHI) effect. This occurs when cities replace green areas with pavement, buildings, and other surfaces that absorb and retain warmth. This leads to significantly higher temperatures in cities compared to surrounding areas. The hotter air rises to form clouds, leading to heavy downpours that can cause floods. “In urban areas, concrete buildings, asphalt and other man-made structures absorb heat faster than surrounding areas, creating pressure differences that lead to low-level convergence. “Hotter conditions in the city make the air mor...