The MRC is a national network of volunteers that are organized into community-based units that work to improve local emergency response capabilities, reduce potential public health risks and vulnerabilities, and build community preparedness and resilience. Volunteers prepare for natural disasters such as tornadoes, floods, and extreme cold, as well as other emergencies affecting public healh, such as disease outbreaks. MRC volunteers also contribute to community preparedness activities, like CPR/AED training and assisting with community vaccination clinics.