How is fire managed in the Kalahari?

This NASA image shows a massive fire affected area on the fringes of the Central Kalahari Game Reserve. Could and/or should the authorities attempt to control them?

http://earthobservatory.nasa.gov/NaturalHazards/shownh.php3?img_id=15034

Why does rain in Angola cause floods in Namibia?

Namibia has been suffering from flooding which is actually caused by rain falling on neighbouring Angola:

http://news.bbc.co.uk/1/hi/world/africa/7279070.stm