New Delhi, July 4 -- It was an overcast and muggy Thursday in the Capital, with scattered rain and high humidity pushing the 'real feel' temperature close to 49degC. The India Meteorological Department (IMD) has forecast similar conditions on Friday, with an increase in rainfall likely from Saturday. A yellow alert for light to moderate showers is in place for the weekend. Delhi's maximum temperature settled at 36.9degC, one degree below normal. However, humidity levels fluctuating between 59% and 89% drove the Heat Index - or 'real feel' temperature - to 48.9degC at 2.30pm and 48.2degC at 5.30pm. The wet bulb temperature, another marker of thermal discomfort, stood at 29.38degC and 29.57degC at those respective times. A wet bulb temperatur...