France on Wednesday recorded a more than 20 percent shortfall in nuclear power production capacity, a record deficit caused by environmentally related outages linked to drought, extreme heat and a jellyfish invasion.

Three reactors at the Gravelines nuclear power plant in northern France were shut down late on Monday due to a massive swarm of jellyfish, triggering preventative measures put…

A nuclear plant in northern France shut down three reactors after a swarm of jellyfish clogged pumps used to cool the units, energy group EDF said on Tuesday.