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.

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

Most of Spain and Portugal are suffering a major blackout; Authorities are still trying to determine the cause of the outage; Transport links have been disrupted, with some issues