This failure only happens when raw hydrocarbons hit the hot converter honeycomb in absence of air, the converter is a thermal reactor at that time - and a localised fire sets off in it of immensely high magnitude. Carby cleaner or petrol dumped in, running extra rich (even on CNG) can cause this.
It has nothing to do with engine heat. In all honesty you should contact Honda and ask them why this happened if your car's service level was at factory tune (meaning you did not fiddle with the fuelling)