power outage sign with city skyline. skyscrapers and other buildings with no light.

font text brand logo line advertising presentation poster screenshot number cartoon diagram signage label circle banner sign document power outage city skyline skyscrapers buildings light complete darkness outage power supply blackout city grid powerplant scenario catastrophy catastrophical skyline darkness dark black sign electricity energy source alternative provide backup standby supplier transmission disaster yellow resiliency resilient failover failsafe skyscraper buildings outline lightning natural war war ukraine capacity surplus deficit