Australian Broadcasting Corporation: SCOTT BEVAN: The heat wave in South Australia as well as Victoria is putting the national electricity supply under extreme pressure not seen since the hot spell of summer 2009.
The Australian Energy Market Operator says it hasn't had to shed any load as yet but the situation is "touch and go".
Load shedding is needed when electricity demand and supply is out of balance and threatens the entire national network.
It means customers are without power for defined periods. Industry and business...