There is a burning smell from the heater.
bru-CIA-to — three syllables, stress on the second.
Report a burning smell from any electrical appliance immediately — it can indicate a fire risk.
'Odore di bruciato' = smell of burning. 'Dalla stufa' = from the heater. This is an urgent safety matter. 'Bruciato' (burnt) is the past participle of 'bruciare' (to burn), used here as an adjective describing the smell.
C'è un odore strano dall'impianto elettrico.
There is a strange smell from the electrical system.
Any electrical smell should be treated as potentially serious
Vedo del fumo dalla presa di corrente.
I can see smoke from the electrical socket.
Visible smoke from sockets is an immediate emergency — leave the room
Penso che ci sia un problema elettrico.
I think there is an electrical problem.
General electrical safety concern
Italian hotels are equipped with fire safety systems under EU and Italian law. Smoke alarms, fire extinguishers, and emergency exit maps are mandatory. If you ever smell smoke or see fire, activate the nearest alarm, call reception, and follow the emergency exit signs marked 'Uscita di emergenza'.