 Upon doing so, Giri became the most intense storm to ever strike Myanmar, surpassing Cyclone Nargis which struck the Irrawaddy Delta region as a low-end Category 4 equivalent in May 2008.However, according to the International Federation of Red Cross And Red Crescent Societies, substantial weakening had taken place within the hours before landfall; they estimated that Cyclone Giri struck the coastline with winds of 175 km/h (110 mph 1-minute sustained).Once overland, the cyclone rapidly decayed as convection dissipated.