Spain’s grid collapsed in 5 seconds. The U.S. could be next.

Spain and Portugal recently experienced the largest blackout in modern European history.

The power grid has no cushion; it must respond instantly or it unravels.

In coal, gas, and nuclear plants, they keep turning, releasing stored energy that slows frequency shifts.

When a power plant trips offline or demand suddenly spikes, the power grid must respond.

PJM Interconnection is set to lose up to 58 gigawatts of firm generation by 2030 .

Midcontinent Independent System Operator plans to retire coal and add solar by decade's end .

After shutting down Indian Point , New York is gambling on offshore wind and Canadian hydro to fill its 2,000-megawatt hole.