Northern Portugal loses power at 12:19 local time. Over 80,000 people affected in Viana do Castelo district near Spain. Serious failure in France hydroelectric plant. Cause remains unknown. Businesses, shops, public institutions paralyzed. Residents lose electricity, internet, landline phones. Water access disrupted in some areas due to electric pumps. Second massive blackout this year. April outage hit entire Iberian Peninsula and south France. PM promises grid expansion, plant modernization, monitoring systems. Repeated blackouts damage Portugal's image and deter investors. Authorities claim situation under control.