Most parts of the country sizzled under intense heat wave as mercury surged up to 50 degree Celsius at Jacobabad, Sh.Benazirbad, 49 degrees Celsius at Larkana, Padidan, Moenjodaro, Sukkur and 48 C at Dadu, Rohri, R.Y.Khan. While it ranged between 40 and 46 degree Celsius in most parts of Punjab, Baluchistan and KPK as weather remained hot and dry on Monday.