The figure of 700,000 refers to properties/connections, not individual people. If the claim intends to measure individual people affected, the number would be significantly higher (estimates suggest 1.5-2 million people).
The peak outage figure was 768,000 ESB customers according to official utility data.
Storm Éowyn occurred on January 24, 2025.
The 768,000 figure represents the Republic of Ireland only; Northern Ireland experienced additional outages (approximately 240,000+ properties).
Sources
SecondaryThe GuardianMore than 725,000 homes and businesses left without power in Ireland after Storm Éowyn
SecondaryRTE NewsAround 790,000 farms and businesses across the island of Ireland still without power
SecondaryBreakingNews.iePeak of 768,000 ESB customers without power, 540,000 still without power that evening
SecondaryNew York TimesStorm left a third of Ireland without power, affecting hundreds of thousands of people