Fire - Fire response to any undesirable combustion, where people or animals were killed or injured, or property values damaged. As fire is considered also such undesirable combustion, where persons, animals or material values, or the environment, would be in imminent danger.

Traffic accident - Fire unit intervention at traffic emergency - collision of transport means, which requires rescue extrication work or liquidation of traffic accident consequences. If other work type prevails in fire brigade's intervention, e.g. due to leakage of hazardous substances to the environment, that intervention is classified according to the prevailing character. Intervention at traffic accidents with subsequent fire is considered as a fire. Cases, where fire brigade only removed vehicles from off-road (towing wrecks, vehicles getting off road, etc.), cleared minor consequences of traffic accidents (road cleaning or removal of leakage - operational filling of vehicles, etc.), are also classified as traffic accidents.

Natural disaster - Fire unit intervention due to an emergency caused by adversely acting forces and phenomenon, caused by natural aerial influences, which endanger lives, health, property or environment - like floods, heavy rains, snow, ice, windstorms, landslides, earthquakes etc. (connected with the emergency state announcement, degree of flood activity etc.), and where fire units perform rescue and liquidation works.

Leakage of hazardous chemical substance - Fire unit intervention at an emergency, connected with undesirable leakage of chemical substances, crude oil products inclusive (during production, transport or handling), and of other substances. Fire unit intervention is aimed to limit or reduce the risk of uncontrolled leakage of combustible, explosive, corrosive, toxic, deleterious, radioactive and other hazardous substances, crude oil products, eventually other substances (natural gas, acids and acid salts, lye, ammonia, etc.) to the environment, including serious accidents according to § 2 of Law on Prevention of serious accidents.

(Note: Hazardous substance - see the Law No. 157/1998 on chemical substances and chemical agents and on amendments of selected other laws, in later regulations.)

Leakage of crude oil product (oil accident) - Intervention of fire unit at an emergency with leakage of exclusively crude oil products (gasoline, diesel or oil). Leakage of those substances from operational fillings of vehicles due to traffic accidents is classified as „traffic accidents“.

Technical incident - Intervention of fire unit to suppress risks or hazardous conditions of major extent, or substantial consequences for health of people, animals and property (except natural disaster), e.g. collapsed building.

Technical assistance - Intervention of fire unit to suppress risks or hazardous conditions of smaller extent, except technologic assistance and traffic accident, e.g.:

• Rescuing of persons from lifts
• Emergency opening of apartments
• Removal of obstacles from roads and other areas,
• Opening of locked areas,
• Liquidation of fallen trees, electric conductors etc.
• Ventilation of areas
• Rescue of persons and animals
• Pumping, shut-off and supply of water
• Assistance in trap-systems search
• Provisional or other repairs,
• Rescue/extrication of objects, persons (water response inclusive)
• Measuring concentration or radiation

Technological assistance Intervention of fire unit aimed to suppress risk or hazardous conditions in technological operation of plants.

Other assistance Fire unit intervention, that cannot be defined as technical or technological assistance, for example transport or transfer of a patient or physician, monitoring of river streams, checking of road ride ability (except natural disaster) etc., even on other service demand (both directly and indirectly provided assistance).

Radiation emergency and accident Fire unit intervention at an emergency with unacceptable leakage of radioactive substances or of ionizing radiation (definition see § 2 of Law No. 18/1997 and § 5 of decree No. 318/2002).

Other emergency - Fire unit intervention at other emergency, e.g. epidemic or infection, safe removal of suspicious packages and as well all interventions and incidents that cannot be classified according to any of the above-mentioned type of fire unit interventions.

False alarm Fire brigade response to reported fire or another emergency that was not confirmed.