Emergency First Aid Guide for City Households: When to Call 911, Life-Saving Steps and What to Keep at Home

Quick answer: in a life-threatening emergency, call 911 first, then start the simplest effective step while you wait. Someone who is unresponsive and not breathing normally needs hard, fast pushes in the center of the chest. Severe bleeding calls for firm, direct pressure with a clean cloth. A person who is choking needs back blows or abdominal thrusts, depending on your training, and a severe allergic reaction needs epinephrine plus 911. Keep a stocked first aid kit, know your address and floor so you can tell dispatchers, and take a hands-on class from the American Red Cross, the American Heart Association or a local fire department.

City living changes first aid in small but important ways. Responders may need to climb stairs, wait for an elevator, find the right unit in a large building or get past a locked lobby door. Ambulance crews are often only minutes away, but those minutes can decide how well someone recovers, and the people nearest to the patient are the ones who start care. This guide pulls the basics together in one place, with plain steps and a clear sense of when to stop treating and start calling.

In this guide

• When to Call 911 and When to Call Someone Else
• What to Tell the 911 Dispatcher
• CPR and AED Basics
• Severe Bleeding
• Choking
• Burns, Heat and Cold
• Allergic Reactions and Asthma
• Heart Attack, Stroke and Other Sudden Illness
• Poisoning, Overdose and Household Hazards
• Building a Home First Aid Kit
• How to Get Trained
• First Aid in a Larger Disaster
• Legal Protections for Helpers
• Frequently Asked Questions
• The Bottom Line

It belongs to our apartment emergency kit and preparedness guide, and it links out to focused articles on the situations people most often search for. Nothing here replaces a hands-on class, and nothing here is medical advice for a specific person. If you think someone is in danger, call 911.

Sources: American Red Cross first aid and CPR guidance; American Heart Association (AHA) CPR and first aid guidelines, including Hands-Only CPR; American College of Surgeons Stop the Bleed program; National Institutes of Health and American Stroke Association (BE FAST); Centers for Disease Control and Prevention (CDC) pages on poisoning, burns and injury prevention; America’s Poison Centers (1-800-222-1222); Ready.gov guidance on first aid kits; American Academy of Allergy, Asthma and Immunology on anaphylaxis. Procedures differ slightly by organization and training level, and guidelines are updated periodically. Checked November 2026. This article is general safety information, not medical advice. Call 911 in an emergency.

When to Call 911 and When to Call Someone Else

The first decision in any first aid situation is whether this is an emergency. Call 911 (or your local emergency number) right away if someone:

• Is unresponsive, or is not breathing or is only gasping
• Has chest pain, pressure or tightness, especially with shortness of breath, sweating, nausea or pain spreading to the arm, back or jaw
• Shows signs of a stroke: sudden face drooping, arm weakness, speech trouble, loss of balance or vision changes
• Has severe bleeding that does not stop with firm pressure
• Is choking and cannot cough, speak or breathe
• Has signs of a severe allergic reaction, such as trouble breathing, swelling of the face or throat, or hives with dizziness or vomiting
• Has a seizure that lasts more than five minutes, repeated seizures, a seizure with no known history, or trouble waking up afterward
• Has a serious head, neck or back injury, or a serious burn
• Has swallowed something poisonous and is drowsy, confused, having trouble breathing or having a seizure
• Is in a situation where you are not sure and the person looks seriously ill

If you are unsure, call. Dispatchers are trained to ask questions and talk you through care, and they can send help while you are still on the line.

Poison questions and non-emergencies

If someone has swallowed, inhaled or touched something harmful but is awake and breathing normally, the national Poison Help line, 1-800-222-1222 in the United States, connects you with a poison center around the clock. It is free and confidential. Save the number in every phone in your home. Our guide on poison emergencies and when to call Poison Control covers what to have ready when you call.

For problems that are urgent but not life-threatening, such as a deep cut that may need stitches, a suspected broken bone with no heavy bleeding, or a fever with no warning signs, a nurse line, urgent care or your own clinician may be the right choice. If symptoms worsen or you are worried, move up to 911.

What to Tell the 911 Dispatcher

In an apartment building, the details you give can save minutes. Be ready to say:

1. The exact address, including building name, unit number and floor, and the nearest cross street if you know it
2. How to get in: the lobby door code, whether someone will meet responders downstairs, which elevator to use and where the unit is on the floor
3. What happened, in a sentence: “My father collapsed and is not breathing normally”
4. How many people need help and their approximate ages
5. What you are doing now and any known conditions, allergies or medicines
6. Your phone number, in case the call drops

Stay on the line until the dispatcher says you can hang up. Put the phone on speaker so you have both hands free. If you can, send another person to open the building door, hold the elevator and wait outside to guide the crew. Leave the apartment door open before responders arrive, and move pets into a bedroom or carrier so they cannot get in the way.

CPR and AED Basics

Sudden cardiac arrest is when the heart stops pumping effectively. The person collapses, does not respond and is not breathing normally, though they may gasp. Survival depends heavily on how quickly CPR starts, because the brain and heart begin to suffer damage within minutes without blood flow.

The American Heart Association teaches Hands-Only CPR for adults and teens who collapse suddenly outside a hospital, and it is the simplest option for a bystander without training:

1. Check that the scene is safe and tap the person firmly while shouting “Are you okay?”
2. If there is no response and no normal breathing, call 911, or tell someone else to call and to bring an AED if one is nearby.
3. Place the heel of one hand on the center of the chest, on top of the lower half of the breastbone, and put the other hand on top.
4. Push hard and fast, at a rate of 100 to 120 compressions per minute, about the tempo of many familiar songs. For adults, the AHA recommends compressing at least 2 inches (5 cm) but not more than about 2.4 inches (6 cm), letting the chest fully rise between pushes.
5. Do not stop until responders take over, an AED tells you to pause, or the person starts to move or breathe normally.

Children and infants are different. Cardiac arrest in children is more often caused by breathing problems, so rescue breaths matter more, and trained responders use compressions plus breaths. Compression depth is about 2 inches (5 cm) for a child and about 1.5 inches (4 cm) for an infant, using one hand or two fingers as taught. If you have not been trained, a dispatcher can coach you, and compressions alone are far better than doing nothing.

Using an AED

An automated external defibrillator checks the heart rhythm and delivers a shock only if one is needed. AEDs are designed for untrained users: turn it on, follow the voice prompts, attach the pads as pictured, and stand clear when told. Many lobbies, gyms, offices and transit stations have one. Locate the AED in your building before you ever need it. Our article on Hands-Only CPR and AED basics walks through the steps and the pad placement in more detail.

Severe Bleeding

Severe bleeding can become life-threatening in minutes. The Stop the Bleed program, run by the American College of Surgeons with national partners, teaches ordinary people three core actions:

1. Call 911.
2. Apply direct pressure. Cover the wound with a clean cloth, gauze or clothing and press down firmly with both hands. Do not lift to check. If blood soaks through, add more material on top and keep pressing.
3. Pack the wound and use a tourniquet when needed. For a deep wound on an arm or leg that does not stop bleeding, trained responders pack gauze into the wound and press, or apply a commercial tourniquet two to three inches above the wound, not over a joint, tightening until the bleeding stops. Note the time it was applied and leave it on until responders take over.

Stop the Bleed courses are short, often free, and teach these steps hands-on. Our guide to Stop the Bleed basics covers each step, what to buy for a home kit and how to use a tourniquet safely. For minor cuts, wash with clean running water and soap, apply a thin layer of ointment if you like, and cover with a bandage.

Choking

Choking happens when food or an object blocks the airway. A person who can cough forcefully, speak or cry has a partial blockage, so encourage coughing and stay with them. A person who cannot cough, speak or breathe, who grips their throat or whose lips turn blue has a severe blockage and needs help immediately.

The American Red Cross teaches a “five and five” approach for a conscious adult or child: give five back blows between the shoulder blades with the heel of your hand, then five abdominal thrusts, and repeat until the object comes out or the person becomes unresponsive. The American Heart Association teaches abdominal thrusts (the Heimlich maneuver) for adults and children over one year. For infants under one year, use five back blows and five chest thrusts, never abdominal thrusts. If the person becomes unresponsive, call 911 and begin CPR, checking the mouth for a visible object each time you open the airway.

Because techniques differ slightly between organizations, a hands-on class is the best way to settle on one method you can perform without thinking. Our guide to choking first aid for adults, children and infants covers each age group.

Burns, Heat and Cold

For most small burns, cool the area with cool, not ice-cold, running water, remove rings or tight items near the burn before swelling starts, and cover loosely with a clean non-stick dressing. Recommended cooling times vary by organization, commonly from about 10 to 20 minutes, so follow your local training. Do not apply ice, butter, oil or toothpaste, and do not break blisters.

Call 911 or get urgent care for burns that are large, deep, on the face, hands, feet, genitals or over a joint, burns caused by chemicals or electricity, and any burn in an infant or older adult. Our guide to burn first aid and what not to do explains how burn depth is described and when a burn needs care.

Temperature emergencies are common in the city. Heat stroke, with confusion, hot skin and a very high body temperature, is a 911 emergency, and hypothermia and frostbite call for gentle rewarming and medical care. We cover them in separate guides on telling heat exhaustion from heat stroke and on cold injuries.

Allergic Reactions and Asthma

Anaphylaxis is a rapid, severe allergic reaction that can affect breathing and blood pressure. Typical triggers include foods such as peanuts, tree nuts, milk and shellfish, insect stings and medicines. Signs include hives, swelling of the lips, tongue or throat, wheezing, trouble breathing, vomiting, dizziness or fainting.

Epinephrine is the first-line treatment. Allergy and emergency organizations advise using an epinephrine auto-injector right away in the outer thigh when anaphylaxis is suspected, calling 911, laying the person flat with legs raised unless breathing is easier sitting up, and being ready to give a second dose if the person’s own care plan says so. Symptoms can return hours later, so the person should be evaluated in an emergency department even if they feel better. Our guide to anaphylaxis first aid explains the steps and how to keep auto-injectors in date.

During an asthma attack, help the person sit upright, stay calm and use their quick-relief inhaler as prescribed. Call 911 if the inhaler does not help, if speech is limited to a few words, or if lips or fingernails look blue.

Heart Attack, Stroke and Other Sudden Illness

Heart attack and stroke are different problems with the same rule: speed matters, and 911 is the right first call. Driving yourself or a family member to the hospital delays care, because paramedics can start treatment on the way and alert the hospital.

Heart attack signs include chest discomfort that may feel like pressure, squeezing or fullness, shortness of breath, cold sweat, nausea and discomfort in the arms, back, neck, jaw or stomach. Women are somewhat more likely than men to have symptoms such as nausea, back or jaw pain and unusual fatigue without obvious chest pain. A dispatcher may tell a person who is not allergic to chew a regular aspirin. Do not give aspirin unless a dispatcher or clinician says it is appropriate. Our guide to heart attack warning signs and what to do covers this in detail.

Stroke signs are summarized by the BE FAST checklist used by the American Stroke Association: Balance loss, Eyes (vision changes), Face drooping, Arm weakness, Speech difficulty, and Time to call 911. Note the time symptoms started, because treatment decisions depend on it. Our guide to stroke warning signs and BE FAST explains why every minute counts.

Other sudden problems that call for 911 include seizures lasting longer than five minutes, severe low blood sugar with confusion or unresponsiveness, a suspected overdose and fainting with chest pain or a fall. If someone is unresponsive but breathing normally and you do not suspect a spinal injury, the recovery position, lying on their side with the top knee bent, helps keep the airway open until help arrives.

Poisoning, Overdose and Household Hazards

Many city households face the same poisoning risks: cleaning products, medicines, button batteries, nicotine and cannabis products, and alcohol. Keep medicines and chemicals locked up and in original containers, and keep Poison Help (1-800-222-1222) on the fridge and in every phone.

For suspected opioid overdose, signs include very slow or stopped breathing, blue or gray lips, pinpoint pupils and unresponsiveness. Call 911, give naloxone if available, start rescue breathing or CPR as trained, and stay until responders arrive. Many states allow naloxone to be bought without a prescription, and community programs often supply it.

Carbon monoxide and smoke are two other household hazards that cause sudden illness. Headache, dizziness and nausea affecting several people at once, especially when heating appliances are running, is a reason to get outside to fresh air and call 911 or the fire department. Working smoke and carbon monoxide alarms are part of first aid, because they prevent emergencies.

Building a Home First Aid Kit

The American Red Cross and Ready.gov both recommend keeping a basic kit at home and another in your car and go bag. A solid starter kit includes:

• Assorted adhesive bandages, sterile gauze pads and rolls, and adhesive cloth tape
• Absorbent compress dressings for heavier bleeding
• Antiseptic wipes, antibiotic ointment and hydrocortisone cream
• Non-latex gloves and a CPR breathing barrier
• Instant cold packs and an emergency blanket
• Scissors, tweezers and a digital thermometer
• Triangular bandages and elastic wrap
• A commercial tourniquet if you have been trained to use one
• A printed first aid guide and an emergency contact list
• Your family’s prescription medicines, spare glasses, and any epinephrine auto-injectors or inhalers, kept in date and easy to grab

Check the kit twice a year, replace expired items and refill what you used. Small apartments need smart storage: a labeled box on a closet shelf near the door, a smaller kit in the kitchen drawer and one in the car. Our guide to a first aid kit for a small apartment has packing lists by space and budget.

How to Get Trained

Reading helps, but practice builds the confidence to act. Options include:

• American Red Cross first aid, CPR and AED courses, in person and blended online
• American Heart Association CPR, AED and first aid classes, including Hands-Only CPR demonstrations
• Stop the Bleed courses from hospitals and trauma centers
• Local fire departments and community emergency response teams (CERT), which often run low-cost or free classes
• Workplaces, schools and community centers that host certification days

Certification usually needs renewal every two years. Many groups offer family or building-wide sessions, which is a good project for a tenants’ association.

First Aid in a Larger Disaster

During blackouts, storms or other widespread emergencies, ambulances may be delayed and clinics may be closed or overwhelmed. Plan to manage minor injuries and chronic needs yourself for longer than usual. Keep at least a week of essential medicines, note any medical device that needs power, and know your backup plan, using our guide to a emergency medication plan for a disaster as a starting point. Keep a battery-powered light near the kit so you can treat someone in the dark.

Legal Protections for Helpers

Most U.S. states have Good Samaritan laws that protect people who give reasonable emergency help in good faith from liability, but the details vary by state. In general, acting within your training, never going beyond what you know and handing over to responders when they arrive keeps you on firm ground. If you have questions about the law where you live, check your state’s statute or ask your local fire department or health department.

Frequently Asked Questions

Should I move someone who is hurt?

Generally no, unless they are in immediate danger from fire, traffic, a collapsing structure or gas. Moving a person with a spine injury can make it worse. If they are unresponsive and breathing normally, and you are alone and must leave to get help, place them in the recovery position.

Is it okay to give CPR if I am not certified?

Yes. Bystander Hands-Only CPR is recommended by the American Heart Association for adult cardiac arrest, and dispatchers can coach you. Doing something is far better than doing nothing.

How long should I wait before calling 911 after a head injury?

Call right away for loss of consciousness, repeated vomiting, seizures, confusion, severe headache, weakness, clear fluid from the nose or ears, or worsening symptoms. For milder bumps, watch closely and seek care if any warning signs appear.

Do I need to call 911 for a seizure?

Call for a seizure lasting more than five minutes, repeated seizures, a first-time seizure, injury, trouble breathing afterward, or if the person is pregnant, has diabetes or does not wake up as expected. Protect the head, time the seizure and never put anything in the mouth.

What should I do while I wait for responders?

Follow the dispatcher’s instructions, keep the person warm and still, watch breathing, and send someone to meet the crew at the building entrance. Gather medicines, a list of conditions and ID so you can hand them over.

Where should I keep my first aid kit?

Somewhere easy to reach and known to everyone in the household: a labeled box near the front door or kitchen, with a smaller kit in your car and go bag. Avoid hot or humid spots such as bathrooms or car glove boxes in summer, which can ruin supplies.

How often should I renew CPR training?

Many certifications are valid for two years, and skills fade, so a refresher every year or two is wise, along with a quick review whenever a new family member joins the household.

The Bottom Line

Good first aid starts with one decision: is this an emergency? If so, call 911, give a clear address, and start the simplest step that fits, whether that is compressions, direct pressure, back blows, epinephrine or the recovery position. Keep a stocked kit, know where the nearest AED is, save Poison Help in your phone and take a hands-on class this season. Those four habits turn a frightening moment into a plan you can follow.