ᐅ Is it possible to run electric radiators continuously?

I am in an unusual situation and hope to get some expert advice.
I own an apartment in western Ukraine that I had renovated. I installed underfloor heating with a gas boiler.
Due to the war, I will not be spending this winter there, and the person who has been taking care of the apartment in my absence is no longer available.
Since the infrastructure is now heavily damaged, there are frequent power outages. Out of concern that the gas boiler might be damaged when the power grid comes back on, I turned it off before leaving. I know that installing a surge protector could prevent this, but unfortunately, I currently have no one who can install it.
Since the heating is off, I am worried that the water in the pipes might freeze.
My idea to get through this winter is to place a small electric heater (e.g., 2000W) in the apartment (for this simple, one-time task I have someone available) and keep it running continuously. As mentioned, my main goal is just to keep the temperature in the apartment (about 80m² (860 sq ft), with new triple-glazed windows) above 0 degrees Celsius (32°F).
My question: is it safe to run the electric heater continuously without supervision for several months, or is there a risk that the device might overheat and possibly catch fire? I would expect that such a simple device would not be damaged by brief power surges when the grid restarts.

Continuous operation would be too risky for me. A timer switch or a temperature-controlled switch?

That's right, that's a good idea. So, using a mechanical timer to heat for 2 hours, then pause for 2 hours, and so on.

kurti2025 schrieb:

That's right, that's a good idea. So, using a mechanical timer switch to heat for 2 hours, then pause for 2 hours, and so on.

No. This is what I mean (just an example). You set the temperature at which heating should start and stop, as well as how long the heating should last as an alternative (cycle mode).

Take a look at socket thermostats. There are also very simple ones with a rotary dial to set the switching temperature and an on-off switch. This helps minimize installation errors.