The Edhi Foundation is funded entirely by private donations and full services are offered to people irrespective of ethnicity, religion or status. It runs the world's largest volunteer ambulance service (operating over 1,500 of them) and offers 24-hour emergency services. It also operates free nursing homes, orphanages, clinics, women's shelters and rehabilitation centres for drug addicts and the mentally ill. Outside of its main base of operations all over South Asia, the Edhi Foundation has also run relief operations in the Middle East, Africa, the Caucasus region, Eastern Europe, and the United States. In 2005, the foundation donated US$100,000 to relief efforts after Hurricane Katrina. As of 2020, the Foundation has international head offices present in the United States, United Kingdom, United Arab Emirates, Canada, Australia, Nepal, Bangladesh, India and Japan.