Answer: If tho I am not an Auto Mechanic, I believe the Electronics in the Car is shutting off the engine to protect it from heat damage. This is most likely ,also, preventing the engine from restarting. I would fix the overheating problem first & see what happens.
It is possible to have a short in the wiring harness to the battery. If there is a lot of corrosion where the cables connect to the battery, this may be and indicator. That is only one possibility.
you will either get a ticket ,or be let off with a warning
Kettle
if you have a good alternator a vehicle will run without a battery, however I wouldn't recommend doing it. On most vehicles the alternator will charge at too high a rate with out a battery installed. This can and will damage any electronics.
This quite often means your altenater is on the way out and not holding a charge,suddenly you will,without warning have a flat battery.You need to get a garage to check if this is corect.
loose or dirty terminals?
Weather can occur without any warning; a traffic accident can happen without any warning; you could drop dead from a heart attack without any warning, etc.
Check to see if the alternator is working Connect a voltmeter to battery: Without engine running reading should be about 12.8 With engine running reading should be 13.8-14.2 If not bad alternator
Without Warning - novel - was created in 2008.
Definitely narcolepsy.... Causes you to have microsleeps at any time without warning. Obviously very dangerous if you are driving a bus full of people.
Illegal without a permit. Check laws on bells and whistles.
Without Warning - video game - happened in 2005.