Children playing in a pool in Dadaab refugee camp, eastern Kenya, on Tuesday Nov. 3, 2009. Aid agencies fear the onset of the rainy season will flood many of the makeshift dwellings, but the camp is already so crowded it is hard to find places to put them. (AP Photo/Riccardo Gangale)

Children playing in a pool in Dadaab refugee camp, eastern Kenya, on Tuesday Nov. 3, 2009. Aid agencies fear the onset of the rainy season will flood many of the makeshift dwellings, but the camp is already so crowded it is hard to find places to put them. (AP Photo/Riccardo Gangale)

This Oct. 22, 2009 photo shows a Somali Kenyan woman laughing as she holds her baby in the settlement of Dela in northen Kenya near the Somali border. The traditional way of life for Kenya’s roughly three million nomads is rapidly giving way under the pressures of increasingly severe and frequent droughts, coupled with a rapidly rising population. In one particularly drought-prone district in Kenya, up to a third of the herdsmen have had to settle permanently because they have lost so many animals. (AP Photo/Karel Prinsloo)

This Oct. 22, 2009 photo shows a Somali Kenyan woman laughing as she holds her baby in the settlement of Dela in northen Kenya near the Somali border. The traditional way of life for Kenya’s roughly three million nomads is rapidly giving way under the pressures of increasingly severe and frequent droughts, coupled with a rapidly rising population. In one particularly drought-prone district in Kenya, up to a third of the herdsmen have had to settle permanently because they have lost so many animals. (AP Photo/Karel Prinsloo)