Bangkok residents stranded by neck-deep floodwaters on Sunday appealed for clean water and food, as Thai Prime Minister Anutin Charnvirakul cut short a diplomatic trip to the United Kingdom to monitor the response amid growing criticism online. In the worst floods to hit the Thai capital in 15 years, life has ground to a standstill in parts of the city since Friday evening, prompting the town hall to declare a disaster in all 50 districts.