MUSCAT: The Civil Aviation Authority (CAA) has issued a warning of heavy rains ranging between 30 mm to 80 mm on Monday night and Tues-day.CAA said heavy rains are expected on Monday night and Tuesday in the governorates of Musandam, North Al Batinah, Al Buraimi, Al Dhahirah, Al Dakhiliyah, South Al Batinah, Muscat, North Al Sharqiyah, South Al Sharqiay.The.