Heavy rainfall exceeding 300mm has triggered severe flooding across Bangkok and surrounding areas, prompting residents in the Silom district to rush to markets and convenience stores to stockpile essentials. Eggs, fresh vegetables, processed meats, and instant noodles have sold out rapidly as consumers prepare for extended disruption. Bangkok authorities have expanded disaster zones to all 50 districts and activated full emergency response including pump operations and possible school closures. Recovery is estimated to take 2-3 days if rainfall subsides.