Portugal is famous for its mild climate and sunny beaches, but each year hundreds of people freeze to death and millions struggle to survive frigid winter weather.

Here's a quick thread based on my @POLITICOEurope story on Portuguese energy poverty

When I lived in Lisbon my friends and I joked that although the Portuguese were famous for melancholia, uncharacteristic (and unrealistic) optimism defined their approach to thermal insulation: homes seemed to be built as if the weather was expected to be perfect year-round.

While the weather is, indeed, really great for most of the year, it can also be really awful sometimes. In the Summer temperatures can shoot up to truly unbearable levels for weeks on end, and in the Winter the icy humidity can easily make you feel like you're freezing 24/7.

This reality is a huge problem precisely because so many Portuguese people live in homes that don't have the capacity to shelter them from the heat when temperatures rise and the cold when they drop. And that means that every year that means people die because of the weather.

This issue can be traced back to the rural exodus that took place during the second half of the XX century, when millions fled the interior to seek better futures either outside the country — immigrating to France, Germany and Luxembourg — or in cities like Lisbon and Porto.