GUNTUR: The officials of the erstwhile undivided Guntur district are on high alert following the heavy rains and the release of surplus water from Prakasam Barrage. People have been evacuated from island villages in Uddandarayunipalem and Thallayapalem in Thullur using boats and shifted to rehabilitation centres. As many as 28 rehabilitation centres have been set up and over 4,500 people …