Yemenis push taxis in a flooded street after heavy rains in Sanaa, Yemen, on April 27, 2013. According to Yemen's official Saba news agency, after heavy rains hit Yemen on Saturday, the Yemeni authorities warned the citizens to take precautions to avoid surprising torrents and rockslides, especially in the mountainous areas, due to the heavy rains and flash floods. (Xinhua/Mohammed Mohammed)

A Yemeni walks in a flooded street carrying a detached part of his car after heavy rains in Sanaa, Yemen, on April 27, 2013. According to Yemen's official Saba news agency, after heavy rains hit Yemen on Saturday, the Yemeni authorities warned the citizens to take precautions to avoid surprising torrents and rockslides, especially in the mountainous areas, due to the heavy rains and flash floods. (Xinhua/Mohammed Mohammed)

Yemenis drive their cars in a flooded street after heavy rains in Sanaa, Yemen, on April 27, 2013. According to Yemen's official Saba news agency, after heavy rains hit Yemen on Saturday, the Yemeni authorities warned the citizens to take precautions to avoid surprising torrents and rockslides, especially in the mountainous areas, due to the heavy rains and flash floods. (Xinhua/Mohammed Mohammed)