Canon EOS M2 Instruction Manual page 132

Do not hold the camera in the same position for long periods of time.
Even if the camera does not feel too hot, prolonged contact with the same body
part may cause skin redness, blistering or low-temperature contact burns. The
use of a tripod is recommended for people with circulation problems or very
sensitive skin, or when using the camera in very hot places.
When shooting, note the following:
Image Quality

When you shoot at high ISO speeds, noise (such as dots of light and banding)
may become noticeable.

Shooting in high temperatures may cause noise and irregular colors in the
image.

If you shoot continuously for a long period, the camera's internal temperature
may rise, and image quality may deteriorate. When you are not shooting, turn
off the camera.

If you shoot a long exposure while the camera's internal temperature is high,
image quality may deteriorate. Set the power to <2>, then wait a few
minutes before shooting again.
White <s> and Red <E> Internal Temperature Warning Icons

If the camera's internal temperature increases due to prolonged shooting or
under a high ambient temperature, a white <s> or red <E> icon will appear.

The white <s> icon indicates that the image quality of still photos will
deteriorate. You should exit shooting and allow the camera's internal
temperature to cool before shooting again.

The red <E> icon indicates that the power will soon turn off automatically. If
this happens, you will not be able to shoot again until the camera's internal
temperature decreases. Turn off the power and let the camera rest for a while.

Shooting at a high temperature for a prolonged period will cause the <s> or
<E> icon to appear earlier. When you are not shooting, turn off the camera.

If the camera's internal temperature is high, the image quality of high ISO
speed images or long exposures may deteriorate even before the white <s>
icon is displayed.
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