Heavy rains and another powerful storm are posing a serious threat to relief operations in Myanmar's cyclone-devastated delta, where so little aid has reached that the U.N. warned Wednesday of a possible «second wave of deaths» among an estimated 2 million survivors, according to AP. The U.S. military's Joint Typhoon Warning Center said there is a good chance «a significant tropical cyclone» will form within a day and head across the Irrawaddy delta, though other forecasters were unwilling to make such a prediction. Rain has been has been pounding the cyclone-hit area all week, and more is expected in the coming days. The weather is compounding the already difficult task of moving aid supplies over ruined roads. It also poses significant health risks to survivors of the original May 3 storm.