New Delhi, April 21 -- The Capital is likely to witness isolated heatwave conditions from Tuesday to Friday, with temperatures expected to remain above 40degC and touch 44degC in some parts, the India Meteorological Department (IMD) has said. Safdarjung, Delhi's base weather station, recorded a maximum temperature of 39.5degC on Monday, three notches above normal. Ridge station in north Delhi was the hottest at 41.3degC. The minimum stood at 22.8degC, a degree above normal and it may go up to 26degC by Saturday. IMD has issued a yellow alert for the period, forecasting maximum temperature to be between 40-42degC on Tuesday and between 42-44degC between Wednesday and Friday. So far, the highest maximum recorded at Safdarjung was 41degC on A...