India, May 19 -- Heat wave to severe heat wave conditions are likely to prevail over plains of northwest India and central India during the week, India Meteorological Department (IMD) has warned. IMD has also warned of severe, large-scale heat waves over UP during the week. So far, this summer, heat episodes over northwest India dissipated quickly due to intermittent thunderstorms over the region. Southwest monsoon has further advanced into some more parts of southeast Arabian Sea, some parts of Comorin area, some more parts of southwest and southeast Bay of Bengal, most parts of Andaman Sea, entire Andaman & Nicobar Islands. htc...