Authorities in Bangladesh are bracing for the spread of waterborne diseases and racing to get drinking water to people after devastating floods last week that left at least 54 people dead and millions stranded. As floodwaters recede slowly, many people remain stranded and in urgent need of food, clean water, medicine and dry clothes, especially in remote areas where blocked roads have hindered rescue and relief efforts. The Bangladesh Meteorological Department said that flood conditions could persist if the monsoon rains continued, as water levels were receding very slowly. Around 470,000 peop…