I live in Eastern Australia. Summer day temps can reach 46C (115F) in the shade. I have experienced all what you describe BUT not often.
Why not often, because I take steps to manage the situation;
Recognise that all systems have inherent weak points, that must be managed. Carburetted Rotax 9's have fuel lines that are vulnerable to "heat soak" from the engine, exacerbated by high ambient temperatures.
ALL Fuel lines within the engine compartment should be well insulated. Fuel lines that are close to exhaust component should have extra attention (shielding and/or better insulation).
Avoid take offs above 30C. This can easily be done by starting your activity at dawn, in the cool of the day. Recommencing in the late afternoon.
Lastly it's not very comfortable to fly above 30C - While on the ground you cook in your own little glass house, density altitude has a negative impact on your aircrafts performance and you usually have to climb/descend through turbulence - fly on another day!
If take off above 30C are unavoidable;
When parked face into wind to assist with static cooling. Open any engine inspection doors/hatches to help clear hot air.
Extend run up times (particularly @ high power) to clear vaporised fuel (vapour lock) from your fuel delivery system.
Run your boost pump from engine start to safe altitude.
Plan for low/nil engine performance ie be prepared for an aborted take off. Use all of the runway available (no intersection take offs). Do not persist with a spluttering/low performing engine, stop & back track.
Lastly, in high temperature periods, consider using AvGas with its lower vaporisation. It may be less likely to cause vapour lock in fuel lines.
