Portugal has no coal mines, oil wells or gas fields. Its impressive hydropower production has been crippled this year by drought. And its long-running disconnect from the rest of Europe’s energy network has earned the country its status as an "energy island.”

Yet with Russia withholding natural gas from countries opposed to its invasion of Ukraine, the tiny coastal nation of Portugal is suddenly poised to play a critical role in managing Europe’s looming energy crisis.

For years, the Iberian Peninsula was cut off from the web of pipelines and huge supply of cheap Russian gas that power much of Europe. And so Portugal and Spain were compelled to invest heavily in renewable sources of energy like wind, solar and hydropower and to establish an elaborate system for importing gas from North and West Africa, the United States and elsewhere.