In response to the turmoil, the White House dispatched presidential coordinator for global energy Amos Hochstein to Europe on Tuesday, officials said.
The impact on Europe could boomerang back onto the US, spiking natural gas and electricity prices, the official said.
It will also be a major test of European resilience and unity against Russia, as the Kremlin shows no signs of retreating from Ukraine.
There will also be discussions in the coming days about increasing nuclear power production across Europe to offset gas shortages, officials said.
US officials, who have been in close touch in particular with German and French officials on this topic, are extremely concerned that Europe might face a serious gas shortage going into winter.
Germany scrapped plans for another Russia-Europe gas pipeline, Nord Stream 2, after Russia invaded Ukraine in February.
"This is an open gas war that Russia is waging against a united Europe," Ukrainian President Volodymr Zelensky said on Tuesday. »