It's on the news now, the government just announced that military controllers will cover when there are not enough civilian controllers (for what I gather it'll just be in specific days, say if there are too many sick as this weekend). Be careful what some of you ask for (Reagan style) you just got served:
El Gobierno habilitará a controladores militares para suplir a los civiles · ELPAÍS.com
El Gobierno habilitará controladores militares para garantizar el tráfico aéreo | elmundo.es
By the way, the ministry thinks they'll be ready in just 24 hours (as soon as they make it into position). Be scared, be very scared. I do not know them all, but have dealt with some in the past (through their association, SODECTA), and know of their shortcomings.
I wish you luck.