Canadian-born actress Catherine O’Hara died on January 30, 2026, at the age of 71, in Santa Monica, California. Authorities confirmed that she died from a pulmonary embolism, with rectal cancer listed as the underlying cause that contributed to the fatal event. Her death certificate was released by the Los Angeles County Medical Examiner, clarifying earlier public statements that described her passing as following a “brief illness”.
TMZ reported that Catherine O’Hara’s death resulted from a blood clot in the lungs. According to the death certificate issued by the Los Angeles County Department of Public Health, the immediate cause was pulmonary embolism, while rectal cancer was identified as the underlying condition.
The document also states that she was cremated, and her ashes were handed over to her husband, Robert “Bo” Welch.
O’Hara had been receiving treatment from an oncologist since March 2025, with her final medical appointment occurring three days before her death. She passed away at a hospital in Santa Monica, California, following what her representatives described as “a brief illness,” according to reports by People and KTLA. Many fans expressed surprise at the news, as her cancer diagnosis had not been publicly disclosed.
The medical examiner’s report clarified that rectal cancer contributed significantly to the development of the pulmonary embolism. The death certificate, dated February 9, 2026, confirms that she was cremated. It further notes that the family’s cottage in the Muskoka Lakes region of Ontario, Canada, was designated as the final place of disposition.
Cancer increases the likelihood of venous thromboembolism, which includes both deep vein thrombosis and pulmonary embolism. Tumor cells can activate clotting pathways, and factors such as reduced mobility, systemic inflammation, and certain cancer treatments may further elevate clot risk.1
Pulmonary embolism remains one of the most serious complications seen in patients with active malignancy. Without rapid treatment, it can lead to sudden deterioration.1
O’Hara’s case illustrates the interaction between chronic disease and acute medical complications. Pulmonary embolism can occur unexpectedly, particularly in patients with known risk factors such as cancer. Early recognition of symptoms, including sudden shortness of breath, chest pain, or collapse, is critical for emergency response.
Her death underscores the importance of monitoring thrombotic risk in individuals diagnosed with malignancies. The confirmed findings provide clarity regarding the cause and mechanism of death while highlighting a well-established medical relationship between cancer and thromboembolic events.
1. Tirandi, A., A. Preda, F. Carbone, F. Montecucco, and L. Liberale. 2022. “Pulmonary Embolism in Patients with Cancer: An Updated and Operative Guide for Diagnosis and Management.” International Journal of Cardiology 358 (July 1): 95–102. https://doi.org/10.1016/j.ijcard.2022.04.068.
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