Tens of thousands of people have marched in Portugal in the biggest protest yet against surging housing prices. Demonstrators in over 30 cities and towns expressed frustration Saturday over the unaffordability of owning or renting a home. Activists have camped out in Lisbon and Porto, demanding rent caps and more affordable housing. The protests echo similar ones in Spain and reflect broader European social unrest. House prices in Portugal have risen much faster than incomes, with a 61% increase in the house price-to-income ratio since 2015. The government has introduced measures to address the crisis, but effects are not immediate.