The choke will cause more fuel to be pulled into the engine and restrict airflow at the same time causing a rich fuel to air ratio. If your engine is cold it needs more fuel than it does when it is warm. Check for vacuum leaks that can cause too lean a mixture even after engine is warm. Also check proper calibration of this mixture through the carburetor, jets, ventures, etc. (optimal 14.7:1 for gasoline at sea level).
The most obvious is that when you are cold and then suddenly warmed it can cause Hypothermia. ALSO, YOU CAN FREEZE TO DEATH!! :)
There are a few things that could cause an 87 Chevy Astro to idle high when it is started and warmed up. It could be a bad fuse, a leak in the vacuum, or an issue with the throttle.
The emissions systems do not work at peak effiectcy until completely warmed up.
Check you've got water in the cooling system.
The whole world is warmed by the sun.
Inhaled air is warmed and moistened in the nasopharynx and oropharynx.
If you have just started it up it hasn't yet warmed up it will idle fast until the computer will read that it is warmed up to operating temperature. If the vehicle is already warm, it is likely that the idle control is out of adjustment OR that the accelerator pedal or the accelerator cable is sticking.
If water is warmed up, then that means that its temperature does change.
When warmed, liquid oxygen changes to a gas for delivery to the patient.
Germans warmed their huts by using the body heat of their farm animals.
The engine has to be running and warmed up for the heater to produce hot air. So yes, you need gasoline to get heat from your car (unless you have an electric car).
There are many products that can be used to melt ice. One is a clay cat litter. It will quickly melt snow and ice in the wintertime.