Health Indicators

Indicators will pop up immediately to the left of your general health status during certain conditions. This is a bad thing, so you should probably try to avoid it.

Radiation

The regular radiation trefoil indicates you are radiated at somewhere below 100%. Once you hit 100%, it will begin blinking an ominous red. Radiation causes toxic damage, radiation sickness, and possible mutations. There are many obvious sources of radiation, but if you suddenly hit 100%+ with no indication why, you may have been shot by a radbow. Get to the Medbay ASAP.

Temperature

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It's too cold! You move at a crawl while at this temperature. If you're standing on a space tile, you'll take burn damage. This status takes awhile to go away, even if you move into a room with normal temp. Space Heaters, certain exosuits, and hot beverages will help you heat up.

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It's too hot! Usually an indicator that you're ON FIRE!!! If you can't find a fire extinguisher, stop drop & roll.

Atmosphere

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You are suffocating, generally because you're in space or a part of the station exposed to space. Put on some internals or move to a safer area. If you have a gas tank on and this pops up, make sure it's not empty, or that you haven't set the pressure too low.

The biohazard symbol indicates that you're breathing plasma. You'll take toxin damage as long as you do, so get some internals on and get out of there before some idiot sets the air on fire.

This indicates that the air you are breathing is too hot and is literally burning your lungs. You will take burn damage quickly as long as you breathe this atmosphere. Generally a sign of a Scientist fucking around. Quickly get your internals on and get out of there.