Why Floods Threaten One of the Driest Places in the World

One of the most water-scarce regions on Earth is now experiencing a dramatic atmospheric shift that's pushing moisture onto Oman's northern coast at rates more than 1.5 times the global average, according to a Washington Post investigation of global atmospheric data [non-paywalled source]. The change has turned extreme rainfall into a recurrent source of catastrophe across the Arabian Peninsula. In the 126 years between 1881 and 2007, just six hurricane-strength storms hit Oman or came within 60 miles of the country. At least four more have made landfall in the past 15 years alone. Research from Sultan Qaboos University analyzing 8,000 storms across 69 rainfall stations found that half of all rain in Oman falls within the first 90 minutes of a 24-hour storm. These intense bursts quickly overwhelm the desert's ability to absorb water and send flash floods racing through wadis -- normally dry riverbeds where many communities are built. In response, Dubai is constructing an $8 billion underground stormwater network spanning more than 120 miles. Oman has agreements to build 58 new dams and is studying 14 major wadis that funnel to its al-Batinah coastline.

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