Zimbabwe has declared a State of Disaster following the capsizing of a Rural Infrastructure Development Agency vessel on Lake Kariba. Image: AFPZimbabwe has declared a State of Disaster following the capsizing of a Rural Infrastructure Development Agency vessel on Lake Kariba, triggering an intensified search and rescue operation. This is the RIDA boat named Mbuya Nehanda taking off earlier before the tragedy struck on Lake Kariba today. Communities used this boat as transport from rural Kariba to Kariba urban. It would take some 5hrs or so to cross Lake Kariba.