No exact number is listed from what I've seen, but they are on the endangered list. More on the lower side.
Houston to Los Angeles, vice versa, is a 22 hour and 6 minute drive, and 1,546 miles apart from each other.
The answer is; Atmospheric circulation patterns keep the temperature of an area constant.
The atmospheric circulation does not keep the temperatures in an area constant, however, they regulate temperatures through convection currents. Hot air rises as cold air mass sinks to replace the rising hot less dense air. These currents transfer energy around the globe and prevent one area from overheating.
