KYIV, Ukraine (AP) — At a Ukrainian power plant repeatedly hit by Russian aerial attacks, equipment department chief Oleh has a one-word answer when asked what Ukraine’s battered energy industry needs most: “Patriot.”

Ukrainian energy workers are struggling to repair the damage from intensifying airstrikes aimed at pulverizing Ukraine’s energy grid, hobbling the economy and sapping the public’s morale. Staff worry they will lose the race to prepare for winter unless allies come up with air-defense systems like the U.S.-made Patriots to stop Russian attacks inflicting more destruction on already damaged plants.

“Rockets hit fast. Fixing takes long,” Oleh said in limited but forceful English.

The U.S. has sent Ukraine some Patriot missile systems, and said last week it would give more after entreaties from President Volodymyr Zelenskyy.