Having an effective disaster management response capability is central to managing civil defense requirements in Saudi Arabia. This paper evaluates the significance of introducing an Expert System (ES) to help support, measure, and improve training and preparedness capabilities of the Saudi Arabian Civil Defense Authority. This paper evaluates the disaster training capabilities, and preparedness needs following many recurrent flash flooding events in Jeddah and Mecca. This paper proposes an ES that could help anticipate, evaluate and improve civil defense flash flood training capabilities against scalable flash flooding risks identified at a local level in Jeddah and Mecca.