ALESSANDRA PRENTICE MORE than two weeks after heavy rains hit Senegal, thigh-high stagnant water still fills streets in Dakar's suburbs, as angry residents ask what happened to a $1.4 billion government plan to protect citizens from rising flood risk. Three months' worth of rain fell on September 5, forcing over 3,200 people to abandon their homes in the poor, low-lying outskirts of the capital and nearby region of Thies. "My children used sand, rocks, whatever was available to stop the water," said Fatou Dioum, whose family of 10 moved to emergency shelter in Dakar's Keur Massar district. Many stricken residents…