core emergency services: http://en.wikipedia.org/wiki/Emergency_service#Core_emergency_services

Civil emergency services

These groups and organisations respond to emergencies and provide other safety-related services either as a part of their on-the-job duties, as part of the main mission of their business or concern, or as part of their hobbies.

• Public utilities — safeguarding gas, electricity and water, which are all potentially hazardous if infrastructure fails
• Emergency road service — provide repair or recovery for disabled or crashed vehicles
• Civilian Traffic Officers — such as operated by the Highways Agency in the UK to facilitiate clearup and traffic flow at road traffic collisions
• Emergency social services
• Community emergency response teams — help organize facilities such as rest centers during large emergencies
• Disaster relief — such as services provided by the Red Cross and Salvation Army
• Famine relief teams
• Amateur radio communications groups — provide communications support during emergencies
• Poison Control — providing specialist support for poisoning
• Animal control — can assist or lead response to emergencies involving animals

http://en.wikipedia.org/wiki/Emergency_service#Civil_emergency_services