Thousands of people were stranded on rooftops and tree branches Wednesday as cyclone-spawned floods surged through towns and villages of Pakistan's coastline, officials said. In the storm-tossed Arabian Sea, navy warships and helicopters continued to search for missing vessels, having rescued about 125 crewmen from floundering craft, said navy and Maritime Security Agency spokesmen. Aircraft and speed boats were also in demand to help hundreds of people on five isolated islands lying some 150 kilometers southeast of Karachi, said Sami Memon, president of the Fisherfolk Forum, a fishermen's welfare body. In Karachi, the country's largest city, five people were electrocuted by falling electricity lines that had earlier been battered by rains and thunderstorms, according to official reports. Cyclone Yemyin struck the coastline of Baluchistan province Tuesday, killing at least 12 people, including four children, said Raziq Bugti, spokesman for the provincial government. Others were believed lost at sea, but no estimates were available.