Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chemical Emergencies ?
    ### Response:
    When a hazardous chemical has been released, it may harm people's health. Chemical releases can be unintentional, as in the case of an industrial accident. They could also be planned, as in the case of a terrorist attack with a chemical weapon.    Some hazardous chemicals have been developed by military organizations for use in warfare.
    