What Is Pulmonary Embolism? Cause Behind Catherine O’Hara’s Death Explained

Legendary actress Catherine O’Hara passed away on January 30, 2026 (ET) at the age of 71. Her sudden death shocked fans around the world. For days, the cause of her passing remained unclear. Now, official records have confirmed that she died due to a serious medical condition known as pulmonary embolism.

Catherine O’Hara was best known for her roles in Schitt’s Creek, Home Alone, Beetlejuice, and Best in Show. Her death has left a deep impact on the global film and television industry.

What Happened to Catherine O’Hara?

According to the Los Angeles County Medical Examiner’s Office, Catherine O’Hara died from a blood clot in her lungs. The death certificate, released on February 9, 2026, officially listed pulmonary embolism as the primary cause of death.

The document also mentioned rectal cancer as an underlying condition. This detail suggests that her overall health may have increased the risk of developing serious complications.

After the report became public, many fans began searching online to understand what pulmonary embolism is and how dangerous it can be.

What Is Pulmonary Embolism?

Pulmonary embolism is a medical emergency. It happens when a blood clot blocks an artery in the lungs. According to medical experts, the clot usually forms in a deep vein, often in the leg. It then travels through the bloodstream and reaches the lungs.

When blood flow is blocked, oxygen levels drop. This can damage lung tissue and strain the heart. If more than one clot is present, the condition can become life-threatening.

Doctors say fast treatment can save lives. But in severe cases, pulmonary embolism can lead to sudden death.

Symptoms of Pulmonary Embolism

Pulmonary embolism often appears without warning. Common symptoms include sudden shortness of breath and sharp chest pain. Some patients may faint or feel dizzy.

Other symptoms may include coughing up blood, irregular heartbeat, fever, heavy sweating, and anxiety. Because symptoms can look like other illnesses, the condition is sometimes difficult to detect early.

Details About Catherine O’Hara’s Final Hours

Reports state that Catherine O’Hara was rushed to a hospital on January 30 after experiencing breathing problems at her Brentwood home in Los Angeles. Despite medical efforts, she was pronounced dead shortly after arrival.

The news spread quickly across Hollywood. Tributes poured in from fellow actors, filmmakers, fans, and public figures. Even the Westminster Dog Show honored her with a tribute video during its event in New York.

Catherine O’Hara was especially loved by dog show fans for her role as Cookie Fleck in the 2000 mockumentary Best in Show.

Catherine O’Hara’s Life and Career

Catherine O’Hara was born in Toronto in 1954. She developed a love for acting at a young age. Her career began at Toronto’s famous Second City comedy theater.

There, she formed a lasting partnership with Eugene Levy. The two later worked together on several projects, including the hit series Schitt’s Creek.

Her film breakthrough came in 1980. She gained worldwide fame through Home Alone and its sequel. In her personal life, she married production designer Bo Welch. The couple had two sons, Matthew and Luke.

A Lasting Legacy

Catherine O’Hara’s talent, humor, and warmth shaped generations of comedy and film. Her death has renewed awareness about pulmonary embolism and its serious risks.

Fans continue to remember her not only for her iconic roles but also for her lasting influence on modern entertainment.