Spain suffered several power glitches and industry officials sounded repeated warnings about the instability of its power grid in the build up to its catastrophic blackout on Monday.

In response to a power outage in Spain and Portugal, the U.S. Department of Energy’s secretary Chris Wright tried to blame the use of solar and wind energy, though the cause of the blackout is not yet

The sweeping power outage that hit Spain and Portugal this week has raised questions about the electricity grid in a region not normally known for blackouts. Monday's outage, one of the worst ever in Europe,