In addition to the all-day strike on Thursday, April 9, a new work stoppage was scheduled for April 14, which has just been called off.
If you use the Lisbon Metro in your daily life, you faced increased difficulties getting around due to a workers’ strike on April 9; service on all Yellow, Blue, Green, and Red lines was completely shut down, with no minimum service.
Second strike on April 14: called off

But the protest schedule might not have ended last week, as the public transit company confirmed that a new strike notice had already been issued for April 14, also with no minimum service.
However, we now know that this strike has been called off, so metro services should be back to normal.