India, Aug. 11 -- Four reactors at France's Gravelines nuclear power plant were shut down late Sunday after a swarm of jellyfish clogged its cooling water filters, operator EDF said on Monday. The incident, likely linked to rising sea temperatures due to global warming, has forced a temporary halt to the entire plant's operations.

Located in northern France between Dunkirk and Calais, Gravelines is one of the largest nuclear facilities in the country. Its six units, each producing 900 megawatts, draw cooling water from a canal connected to the North Sea. EDF data showed the remaining two reactors were already offline for planned maintenance when the jellyfish swarm hit.

Reactors 2, 3 and 4 automatically shut down just before midnight af...