have the car checked out, it could be a bad o2 sensor or a plugged converter.
Loss of power, and a converter that gets red hot.
Loss of power, excess use of fuel, and converter will get red hot.
Your converter is clogged and needs replacing.
Not likley. You will normally see a loss of power and the converter will get red hot.
Loose of power, hard starting, poor fuel mileage, and the converter will get red hot.
A partially clogged converter can get red hot. It could possibly start a fire.
the converter is blocked inside. you have to replace it.
I dont quite understand the question, but if it is what i think it is, then the reason a catalytic converter heats up very hot is because it is a component that uses exhaust fumes, and ehaust fumes are hot as they are the end result of an explosion that happened in the engine, therefore heating up its surroundings and making the catalytic converter hot. a catalytic converter glowing red is normal, and even in my 50cc moped (which was new) the catalytic converter glowed red, so for one in a car engine, that doesnt surprise me (far more exhaust fumes).
Partially clogged or engine misfire.
The converter is plugged and needs to be replaced
If it is red it means it is clogged and needs replacing. If you do not replace it your fuel mileage and power will suffer.
check the catalytic converter. if the engine isisnt running hotter than normal it is most likely plugged exhaust somewhere likely in the catalytic converter