Stay present: you can better react to your surroundings and help yourself and others to safety.

Counting breaths helps focus your mind so you can figure out the best next step.

Where are you? Give as much detail as you can, including: NYC borough, address, cross streets, intersection, floor number, apartment number, and any other relevant information. Speak clearly and repeat yourself if asked.

This is essential information so that emergency responders can find you quickly.

Describe what happened and what’s happening now with as much detail as you can provide.

How many people are involved? How many suspects are there?

Describe what kind of weapon was used (or what it looked like) and if you think there is an ongoing threat.

Describe what the suspect(s) were wearing, what they looked like, their voice, and which way they went if they left the scene.

How many people were affected? What kinds of injuries?

If possible, wash your hands or apply hand sanitizer before and after treating the wound.

Insert sterile dressing or any clean cloth into the wound, then use more cloth to cover it. Press directly on top of the wound.

If you have pressure bandages, wrap them around the limb, covering the wound.

Tourniquets are special bandages designed to stop bleeding. They work by cutting off blood flow to a limb. You can also make one out of a clean cloth and a stick-like object such as a pen.

Apply the tourniquet close to the wound, above the joint. Do not apply a tourniquet on a knee or elbow.

Wrap the tourniquet around the limb. Twist the stick to tighten the bandage, then secure the stick with a knot. If possible, mark the time that you applied the tourniquet — this will help paramedics later on.

For instructions with images, see the following poster from StopTheBleed.org

Listen to Notify NYC alerts and instructions from first responders (NYPD, FDNY) to learn if you should stay or go.

• Shooter: GO if it is safe to leave
• Explosion: GO
• Radiological: STAY unless you are in immediate danger
• Biological: GO get away from immediate danger
• Chemical: GO get away from immediate danger

Have a clear path? Run.

If you can’t get out, pile furniture against a door. Be quiet; silence your phone.

If you and others are in the open with nowhere to hide and no way out, use what you can to defend yourself — throw things, etc. — until first responders arrive.

More on how to survive an active shooter

Do not use your phone unless it’s for emergency information. Games can wait.