California rolling blackouts warning issued for 3 million homes

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News ID: 47499
Publish Date: 11:41 - 18 August 2020
Tuesday, 18 August 2020_The agency running California’s power grid has warned that millions of homes could be hit by rolling blackouts imposed on Monday to manage overwhelming energy demands caused by an extreme heat wave baking the state for a fourth straight day.

California rolling blackouts warning issued for 3 million homesOfficials for the California Independent System Operator estimated that peak electricity consumption on Monday would likely exceed available supply statewide by as much as 4,400 megawatts - roughly equivalent to the amount of power needed by 3.3 million homes.

A lapse of that magnitude would mark the most severe shortfall to strike California’s grid since 2001, the last time utilities in the state essentially rationed energy in the form of rolling blackouts, said Ralph Cavanagh, energy co-director for the Natural Resources Defense Council, an environmental group.

The controlled power disruptions, with alternating blocks of utility customers losing electricity for one or two hours at a time, are designed to prevent excess demand from triggering a more widespread collapse of the grid that could last days.

An earlier round of rotating outages this weekend affected around 408,000 customers of four utilities across California, more than half of them served by Pacific Gas and Electric Company (PCG.N).

Stephen Berberich, president and CEO of the Independent System Operator, told reporters on a conference call that Monday’s blackouts could run from late afternoon to late evening.

The full extent of outages is a moving target that hinges largely on how much energy customers might conserve during the day as part of a Flex Alert declared by the agency on Sunday, urging consumers to voluntarily scale back electricity use.

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