LOS ANGELES( BLOOMBERG)-Californians once greeted hot summers by blasting the air conditioners and filling the pool.... No longer. Battered by drought and heat waves that are straining the power grid, the Golden State is asking residents to make do with less water and electricity, just when they really want to use both.... He warned the situation could last for several years. Meanwhile, Governor Gavin Newsom is asking the state to use 15 per cent less water, as reservoirs shrink....