Thunderous explosions hit Kyiv and regions across Ukraine on Monday morning, leaving many without power or water as Russia launched a fresh barrage of airstrikes on critical infrastructure — its strongest and widest-spread attack since the opening salvo in a new aerial bombardment strategy on Oct. 10.

Ukrainian officials said Russia launched dozens of cruise missiles, many of which were intercepted by air defenses, and they warned again that civilians should prepare for long-term power and water outages. There were no immediate tallies of casualties, but officials said there were people wounded.

The strikes hit 10 regions and damaged 18 targets, most of which were energy facilities, Ukrainian Prime Minister Denys Shmyhal said.

Kyiv Mayor Vitali Klitschko said the strikes had left 80 percent of the capital city without a water supply — disrupting the Monday morning routine for hundreds of thousands of residents — and that engineers were working to restore electricity at a damaged facility that supplies power to 350,000 Kyiv apartments.

As air raid sirens wailed across Ukraine, explosions and power outages were also reported in the Kharkiv region in the northeast, in the Cherkasy, Poltava and Dnipropetrovsk regions in central Ukraine, and in Zaporizhzhia in the southeast. Several hydroelectric dams appeared to be specific targets on Monday.