Today, according to the news , the workers of SEA (the company that owns the airports) are on strike.
(sorry only in Italian)
The workers seem to be on strike against the left wing Major of Milan (that is the bigger shareholder of the company).
The national radio spoke also of worker blocking the entrance of MXP T1 and the road (Viale Forlanini) to LIN.
Of course many flights may be affected.