Power outage on the Iberian Peninsula in the Day Night Band
Power outages over the Iberian Peninsula on 28-29 April 2025 have caused wide-spread travel (and life) disruptions (Reuters link). Day Night Band imagery from the NASA Worldview Site (link), shown below, show a reduction in city lights especially over southern Spain on the 29th. The NOAA-20 overpass on 29 April was shortly after 0140 UTC. Skies at that time were mostly clear over southern Spain
The 3-day animation below includes imagery from 27 April as well.

When NOAA-20 overflew Spain early on 30 April, Day Night Band imagery did not show widespread outages, as shown below.
