Portugal could face its most complete shutdown of public services in more than 20 years next month after the two largest trade union alliances agreed to join in a general strike.
The November 24 strike is to protest against government austerity measures aimed at cutting Portugal's heavy debt load, which has triggered a financial crisis.
The centre-left Socialist government plans to raise taxes and cut pay and welfare benefits.
The General Worker's Union announced on Thursday it will join the strike called last week by the slightly bigger General Confederation of Portuguese Workers.
Together, the two umbrella groups represent close to 1.5 million workers, mostly blue-collar staff and civil servants. They last staged a joint strike in 1988.