Romania shut down Cernavodă’s second and last operating nuclear reactor Thursday after the drought-hit Danube River fell too low to supply its cooling pumps.

“At 10:53 a.m., Unit 2 of Cernavodă NPP was shut down in a controlled manner,” Romania’s Energy Ministry said in a press release.

The government insisted the national grid remained stable and said it would bridge the shortfall with imports, hydropower, wind, coal and reserve generation. Romania had already notified the European Commission of an electricity crisis after the shutdown of Unit 1 on July 28, with Unit 2 accounting for roughly another 700 megawatts — about 10 percent of national production.