The category-1 cyclone, with wind gusts of 85-90km per hour over the next 24-36 hours, is expected to hit just north of Chittagong, near the border with Myanmar, according to an update issued on [15 May](http://reliefweb.int/report/myanmar/un-ocha-flash-update-5-cyclone-mahasen-bangladesh-and-myanmar) by the UN Office for the Coordination of Humanitarian Affairs (OCHA).