Is it okay to leave the heater plugged in over time?

Both of my parents are out at work and I didn t want to risk getting late to school just so I check up on it. I was hoping it wouldnt be too bad as I know I did turn it off, I just don t know if I took out the plug. I was wondering if since it s plugged in would it lead to any fire hazards? It is plugged into the... show more Both of my parents are out at work and I didn t want to risk getting late to school just so I check up on it. I was hoping it wouldnt be too bad as I know I did turn it off, I just don t know if I took out the plug. I was wondering if since it s plugged in would it lead to any fire hazards? It is plugged into the wall only and the heater is somewhat old. Also even if it was left on the heater turns off the air by itself at a certain time I m pretty sure so I dont think I actually have to worry about that so much.
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