KAMPALA — The death toll from a landslide at a vast garbage dump in Uganda’s capital Kampala has risen to 21, police said Sunday, as rescue workers continued to dig for survivors.

After torrential rain in recent weeks, a huge mound of garbage at the city’s only landfill site collapsed late Friday, crushing and burying homes on the edge of the site as residents slept.

President Yoweri Museveni said in a statement he had directed the prime minister to coordinate the removal of all those…