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Policy Statement 389 - Mitigating the Impacts of Natural and Man-Made Disasters


Approved by the Infrastructure and Research Policy Committee on March 16, 2017
Approved by the Public Policy Committee on June 5, 2017
Adopted by the Board of Direction on July 29, 2017


The American Society of Civil Engineers (ASCE) supports sustained efforts to improve professional practices in planning, design, construction, operation, maintenance and reuse/decommissioning that mitigate the effects of natural and man-made hazards. ASCE is committed to developing standards and participating in other national and international initiatives that incorporate resilience as a fundamental performance criterion and encourage mitigating the effects of hazards and improvement of warning systems against impending hazards. ASCE will collaborate and cooperate with government, citizen, and private agency initiatives and supports activities for hazard mitigation, emergency preparedness, and disaster recovery. ASCE supports efforts to ensure sufficient federal, state, and local funding is available for research, development of standards that emphasizes resilience, enforcement, emergency preparedness planning for response and recovery, and for disaster mitigation funds that are non-taxable.


Natural hazards are forces of nature such as floods, hurricanes, tornadoes, earthquakes, landslides, tsunamis, wildfires, droughts, heavy winter storms, volcano eruptions, dust storms and other events. Man-made hazards include explosive, chemical, biological, cyber and radiological attacks and other accidents or terrorist acts. Natural and man-made hazards may result in the loss of life, damage and destruction of property, and interruption of business that causes immediate and long-term economic, social, and environmental losses. Appropriate mitigation measures can significantly reduce these losses. 

According to the National Academy of Sciences, "the key to reducing loss of life, personal injuries, and damage from natural disasters is widespread public awareness and education. People must be made aware of what natural hazards they are likely to face in their own communities. They should know in advance what specific preparations to make before an event, what to do during a hurricane, earthquake, flood, fire, or other likely event, and what actions to take in its aftermath".


ASCE is a prominent stakeholder in national and international efforts because civil engineers hold paramount the safety, health and welfare of the public. ASCE develops and maintains standards, supports the funding of professional guideline writing organizations such as the Building Seismic Safety Council and the American Lifelines Alliance, and works with governments at all levels to assist in mitigating the impacts of natural and man-made hazards.

As the stewards of infrastructure, civil engineers, plan, design, construct, operate, maintain, reuse, and decommission buildings, bridges, roads, pipelines, towers, dams, and other infrastructure elements which are susceptible to natural and man-made hazards.

National performance-based standards emphasizing resilience are needed to assure that appropriate and consistent design and construction methods are available worldwide for mitigating natural and man-made hazards. These standards rely on the collaborative work of various agencies and professional societies. Adequate funding is needed for professional guideline-writing organizations, such as the Building Seismic Safety Council and the American Lifelines Alliance.

As the leading professional society representing civil engineers involved in mitigating the effects of disasters on the physical and natural built environment, ASCE needs to maintain its leadership role in improving practices that reduce vulnerability and improve resilience.

ASCE Policy Statement 389
First Approved in 1992