If the temperature warning light/gauge goes on, what should one do?
stop as soon as you can at a safe place and shut the engine off.
open the radiator cap to check the water level.
keep driving to the nearest mechanic.
ignore the light, it will go off when the engine cools off.

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )