Mai Mahiu, Kenya — Kenyan President William Ruto on Tuesday deployed the military to evacuate everyone living in flood-prone areas in a nation where 171 people have been killed since March by torrential rains. Seasonal rains, amplified by the El Nino weather pattern, have devastated the East African nation, with floodwaters engulfing villages and threatening to unleash even more damage in the weeks to come. In the worst incident, which killed nearly 50 villagers, a makeshift dam burst in the Rift Valley before dawn Monday, sending a torrent of water and mud gushing down a hill and swallowing everything in its path. The tragedy in Kamuchiri village, Nakuru county, was the deadliest episode in the country since the start of the March-May rainy season. Ruto, who visited the victims of the Kamuchiri deluge after chairing a Cabinet meeting in Nairobi, said his government had drawn up a map of neighborhoods at …