It might.
Does the sound follow the space heater to a different outlet?
If you place your head between the space heater and the outlet, does the hissing sound come from the wall, or from the heater? Sometimes different sounds come from different sides of applicances, and these sounds can reflect off the wall.
A standard vacuum cleaner and some electric irons draw about the same current as a space heater. Is the sound present with either of those plugged into the same outlet instead?
It might be a snake, saying "thank you" for the warmth.
If blood is coming through an arm cast, it could indicate a serious problem such as a deep cut or a broken blood vessel. It is important to seek immediate medical attention to determine the cause and receive appropriate treatment to prevent further complications or infection.
An approaching storm
climate change ... the continuous coming of typhoon... and overheat!
The pilot light in a GFCI is an indication that the receptacle is hot, maybe they should add a red pilot light to indicate that no power is coming out of the outlet and green when power is available.
Earthquakes are a relatively common occurrence in Italy. Most of the time they do not indicate a catastrophic event is coming.
A hissing sound coming from a chest wound can indicate that air is being sucked into the chest cavity through the wound. This is known as pneumothorax.
Likely to be a punctured lung.
No, -but that could indicate you have a major electrical problem.
i had the same problem with my car two and i found out that it was my fuel pump
Coughing up blood, Sucking or hissing sound coming from the wound, frothy blood coming from the wound.
coz ur momma is in ur bonnet!
the drain hose is plugged
air coming out of the brake lines... that is if its a truck. if you aply the parking brake.
if you are getting a hissing noise when you press the accelarator , it might be coming from the exhaust , this is usally caused by a clogged catilytic converter
The hissing may be due to a disconnected vacuum line. Look for a loose vacuum hose and/or a tube on/near the throttle where it might connect to.
Coughing up blood, sucking or hissing sounds coming from a chest wound, frothy blood appearing from air bubbles coming from the wound
A blood clot coming out is a very serious problem. it could indicate many things. Only a doctor can diagnose you.