The opposition said, however, that such a plan would only offer a short-term solution to Lithuania which lacks power generation capacity.
"We have very clear plans as to what we will do in the event of an extraordinary situation in Lithuania," Kreivys told reporters after a meeting of the parliamentary Committee on National Security and Defense and the Commission for Energy and Sustainable Development.
"We have ready stocks of gas and fuel: diesel, petrol. There is a very clear plan for the stability of the electricity system," the minister said.
"I cannot go into details, but everyone's home will be warm and lit. I can guarantee that," he added,
The meeting was held to discuss Lithuania's energy situation in the context of geopolitical developments in Europe.
MP Arvydas Nekrosius of the opposition Farmers and Greens Union said the plan would only provide a short-term solution.
"Electricity generation is probably our biggest problem, because Lithuania does not have enough capacity to meet its electricity needs. We import most of our electricity and are dependent on Swedish producers," he said.
However, Paulius Saudargas, a member of the Commission for Energy and Sustainable Development, said that Lithuania will not be left without electricity if Russia turns off the switches for its neighbors.
According to the conservative MP, Russia is making preparations to supply Kaliningrad with gas via the exclave's liquefied natural gas terminal.
"Ships are going to Kaliningrad. It looks like preparations are underway in case, say, they cut off all gas supplies via Lithuania to Kaliningrad and the whole of Europe. Russia is apparently modelling these scenarios," Saudargas said.
"We will have gas because we have the (Klaipeda LNG) terminal," he added.
Lithuania, Latvia and Estonia are still part of the BRELL electricity system that is run from Moscow.