First, it's important to know how to spot someone who's drowning? Their feet usually look like they're climbing up stairs, according to Thompson, and their arms are going up and down in the water -- they're not screaming for help. As Thompson puts it, "all the action is occurring under water. There's no splashing to be heard."
If you see someone drowning, scream for someone to call 911. Do not jump in the pool with them -- this could lead to them pulling you under as well -- then use your arm or a pool skimmer to pull them toward you, grab them by the wrists and pull them up and out of the water.
If they've stopped breathing, roll them over and start CPR. Although the most commonly seen form of CPR is mouth-to-mouth, this isn't necessary. Instead, do about 100 chest compressions per minute.
