A Washington Post investigation found that in one of the planet’s most arid regions, extreme rain and floods have become frequent and deadly.

Visitors at a waterfall in Rustaq, north of Oman, scream as a man is swept downstream during a flash flood. Sightseers make it out by scrambling up a rocky bank as fast-flowing flood water and debris ...

A year’s worth of rain fell in one day in some areas across Oman and the United Arab Emirates, bringing cities to a standstill. By Yan Zhuang Follow our coverage of the flooding in Oman and Dubai.