Do I Need an Ambulance? When to Call 911

If someone is unresponsive, is not breathing normally, has severe trouble breathing, shows signs of a heart attack or stroke, has uncontrolled bleeding, or appears to have another life-threatening emergency, call 911 immediately. Other situations can be harder to judge, especially when the person is awake and talking, another person is available to drive, or the hospital is nearby. Whether an ambulance is needed depends on how serious the condition may be, whether it could get worse quickly, whether the person can be moved safely, and whether they may need medical care before reaching the hospital.

For nearly 50 years, EMSA has provided prehospital emergency medical care and medical transportation for Oklahomans throughout the Oklahoma City and Tulsa metro areas. Our patient care protocol is guided by an independent Medical Director who oversees clinical protocols, training, credentialing, and quality standards, along with a Medical Control Board made up largely of physicians who work in area hospital emergency departments. This medical oversight helps ensure EMSA crews are always prepared to assess and treat a wide range of illnesses and injuries before patients reach the hospital.

People sometimes hesitate to call 911 because they are not sure whether a situation is serious enough, they do not want to overreact, or they believe they can get to the hospital faster on their own. You do not need to know exactly what is wrong before asking for emergency help. If symptoms seem severe, are getting worse, or you are unsure whether the person can safely wait or travel by car, call 911 and explain what is happening. The dispatcher can gather information, determine the urgency of the call, and send the appropriate emergency response.

Call 911 when an illness or injury could threaten someone’s life, breathing, blood flow, brain function, or ability to be moved safely. Some emergencies are obvious, while others may begin with symptoms that seem less severe.

• Chest pain or signs of a heart attack, especially with shortness of breath, sweating, nausea, dizziness, or pain spreading to the arm, back, neck, jaw, or stomach.
• Signs of a stroke, including sudden facial drooping, weakness or numbness on one side, trouble speaking, confusion, vision changes, loss of balance, or a sudden severe headache.
• Severe trouble breathing or choking.
• Loss of consciousness, collapse, or difficulty waking someone.
• Heavy bleeding that will not stop.
• A severe allergic reaction, particularly swelling of the face, tongue, or throat or trouble breathing.
• Certain seizures, including a first seizure, a seizure lasting longer than five minutes, repeated seizures, or trouble breathing or waking afterward.
• Serious injuries, such as major vehicle crashes, significant falls, major burns, or possible head, neck, or back injuries.
• Any sudden condition that is quickly getting worse.

Waiting to see whether severe symptoms improve can delay care for conditions where time matters. Calling 911 allows trained responders to begin evaluating the person and providing appropriate care as quickly as possible.

The distance to the hospital is only part of the decision. Even during a short drive, a person’s condition can change, and a private vehicle does not provide medical monitoring or treatment if that happens. The driver may also have to divide their attention between the road and a seriously ill or injured passenger.

If you are the patient, you should not drive yourself when symptoms could affect your ability to drive safely. Severe chest pain, difficulty breathing, dizziness, weakness, confusion, severe pain, changes in vision, loss of coordination, or feeling as though you may pass out can put both you and others on the road at risk.

Calling 911 is safer than driving when:

• The person’s condition could worsen suddenly.
• They cannot safely stand, walk, sit up, or get into a vehicle.
• Moving them could make an injury worse.
• They are confused, unconscious, extremely weak, or difficult to wake.
• They have serious chest pain, breathing problems, stroke symptoms, major bleeding, or significant injuries.
• The person driving would also need to monitor or care for them along the way.

An ambulance provides a controlled setting where the patient can be safely moved, monitored, and treated throughout the trip rather than waiting until arrival at the emergency department for medical care to begin.

An ambulance is equipped to begin medical care at the scene and continue it during transportation. EMTs and Paramedics can assess the patient, monitor vital signs, manage breathing problems, control serious bleeding, provide CPR or defibrillation when needed, give appropriate medications and treatments, and take steps to stabilize the patient’s condition.

The crew can continue watching for changes during the trip and respond immediately if the patient’s breathing, heart rate, blood pressure, level of consciousness, or other symptoms worsen. For a patient with a serious illness or injury, those minutes can be used for active medical care rather than simply getting from one place to another.

EMS crews can also communicate important information to the receiving hospital, including what happened, the patient’s condition, findings from their assessment, treatment already provided, and any significant changes during transport. For certain emergencies, that advance information can help the emergency department prepare for the patient’s arrival and the care that may be needed next. Crews can also help determine which hospital is appropriate for the patient’s condition when specialized care may be necessary.

Children and older adults may have more difficulty describing symptoms, and changes in their condition may be less obvious at first. Pay close attention to sudden confusion, unusual sleepiness, trouble breathing, severe weakness, difficulty waking, significant injuries, or a major change from the person’s normal behavior or abilities. If they appear seriously ill or injured or cannot be transported safely, call 911.

When you call 911 for a medical emergency, the dispatcher will ask questions about where you are, what happened, and the patient’s condition. These questions help determine how urgent the situation is, what type of response is needed, and what information responders should have before they arrive.

When you call 911, be prepared to provide:

• The exact location of the emergency.
• Your phone number.
• What happened or what symptoms the person is having.
• The patient’s approximate age.
• Whether the person is awake and breathing normally.
• Information about serious bleeding, injuries, pain, or other major symptoms.
• Directions or access information if the patient may be difficult to reach.

You do not need to have every answer before calling. Give the dispatcher the most accurate information you have and answer each question as clearly as possible. In the EMSA system, certified emergency medical dispatchers use medical-priority protocols to determine how urgently a call should be handled and what resources should respond.

Stay on the line until the dispatcher tells you to disconnect. Responders may already be on their way while additional questions are being asked. The dispatcher can use that time to gather information for the EMS crew, watch for signs that the situation is changing, and give instructions for what to do before help arrives. Depending on the emergency, those pre-arrival instructions may include CPR, the Heimlich maneuver, bleeding control, or other immediate steps that can help the patient until the ambulance arrives.

Follow the dispatcher’s instructions first. While the ambulance is on the way, focus on keeping the patient as safe and comfortable as possible, watching for any changes in their condition, and making it easier for responders to reach them quickly and begin care.

When possible, you can also:

• Unlock the door and make the location easy for responders to find.
• Secure pets away from the patient and entryway.
• Keep medications or a medication list nearby.
• Have information about medical conditions and allergies available.
• Clear enough space around the patient for responders to work.

If the person’s condition changes while you are waiting, tell the dispatcher immediately so that information can be passed along to the responding crew.

Calling 911 does not automatically mean the patient will be taken to the hospital. EMSA crews can assess the patient’s condition, check vital signs, gather medical information, provide appropriate care, and determine whether ambulance transportation and further hospital evaluation are recommended.

Some patients are evaluated or treated at the scene and are not transported. A patient who is able to make their own medical decisions may also choose not to go to the hospital after discussing the situation and possible risks with the EMS crew. You do not need to make that final decision before calling 911 when you believe a serious medical problem may be happening.

EMSA serves more than 1.1 million Oklahomans, and in 2025 earned a perfect Commission on Accreditation of Ambulance Services reaccreditation score, an accreditation achieved by only about 1% of EMS agencies nationwide. We can provide that level and quality of emergency care because our trained EMTs, Paramedics, dispatchers, clinical educators, and medical leadership work within a coordinated system supported by fully equipped, state-of-the-art ambulances. Those ambulances are strategically positioned throughout our service area using historical call data and carry the advanced equipment and technology crews need to assess, stabilize, treat, and safely transport patients with a wide range of medical emergencies, from serious illness and breathing problems to cardiac arrest and major trauma. If you ever need an ambulance, you can trust EMSA to be there.

If someone has severe or rapidly worsening symptoms, cannot be moved safely, or may need medical care before reaching the hospital, call 911.