Short version: When there is a high load on the power grid in general, does it make it more likely that my fuse will blow?
Full version: I'm renting an apartment in Rome, where we are currently experiencing a heat wave. When running the air conditioning unit on max, the circuit breaker will regularly trip after an hour or so, taking out the power in the apartment. Since I have to go down to reset it, I know that my apartment is the only one affected, i.e. my power is lost, but no other apartments in the building are affected.
When asking my landlord if he can rectify the situation (e.g. by installing a circuit breaker that can handle a slightly higher current), he says that the power grid is overloaded by people using their AC in the warm weather, and there is nothing he can do.
I intuitively find it hard to understand that an overloaded grid will lead to my circuit breaker tripping easier, but I don't have a super strong grasp on alternating currents and building/city level grids. Can anyone help me understand, or alternatively make my case?