More than 150,000 people have left their homes in Burkina Faso, many in the capital Ouagadougou, where the United Nations says the amount of rain that fell in one day last week equals one-quarter of the nation's average annual rainfall.
VOA: standard.2009.09.06
"This year, theamountofrainfall in the area diminished significantly, " said Javier Ramirez, head ofthe Cutzamala system.
The researchers also say there was little change in theamountofrainfall in the region over the last few decades and so could not account for changes in glacier retreat.