Due to unusual heavy rain in Dubai and water-logging at  Dubai airport , many flights have been delayed or cancelled. <br />'' <br />'' Incessant rain over the last 48 hours have left many areas flooded . <br />'' <br />'' Most of the schools have been closed. In Dubai, the downpour, which had started on Friday night,fell at a rate of 150 millimeters per hour, for two and a half hours. <br />'' <br />'' Dubai Media Office described it as "unusually heavy rain" on its Twitter account. <br />''