Kathmandu. According to the weather forecast released by the Department of Hydrology and Meteorology for Sunday, the weather across the country will be mixed today. Cities in the western Terai will experience extreme heat, while there is a possibility of rain with thunderstorms in the hilly and eastern regions.A 'heatwave' is forecast to occur in Nepalgunj this afternoon, with the maximum temperature reaching 38 to 40 degrees Celsius. Similarly, the temperature in Dhangadhi and Bhairahawa will also reach 38 to 40 degrees, making it a very 'hot day'.Dipayal, Simara, and Janakpur will also have hot days, with temperatures around 34...