Start at the DB board: what a trip is actually telling you
Every UAE home has a distribution board (DB), usually a grey or white panel near the entrance or in the corridor. Inside sit a main isolator, one or more RCDs (residual current devices, the wide switches with a test button) and a row of MCBs, the small breakers that each protect one circuit: kitchen sockets, bedroom sockets, lighting, the water heaters, the AC units. When something trips, which switch went down tells you most of the story before anyone picks up a phone.
A single MCB tripping repeatedly means one circuit is overloaded or has a faulty appliance or fixture on it. An RCD tripping means electricity is leaking to earth somewhere, classically through a failing water heater element, a washing machine, or moisture in an outdoor fitting. The whole board going dark while your neighbours still have power usually points to the main incomer or the utility's side of the connection, which is not something any private electrician is allowed to open.