NAIROBI, Kenya--The long rainy season in Kenya has begun and sudden storms regularly burst over Nairobi. Many welcome the downpours, which signal the end of another dry summer and wash the steamy crowded capital clean each morning.

In Kibera, a massive slum of rusty tin roofs and makeshift homes spreading out from the southwest of the city, the rain is turning the twisting dirt roads and alleyways to thick red mud.

Here in one of largest slums in the world--a flashpoint for violence stemming from Kenya's parliamentary elections in December--the rain is causing open sewers to swell and uncollected garbage to rush in rivers of tattered plastic and human waste through backyards.

Audio slideshow by Alex Stonehill, produced in association with the Pulitzer Center On Crisis Reporting for http:1h2o.org.