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Resilience

Disaster & failure studies

Progress

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NIST Hurricane Maria Program | Technical Update (July 2025)
NIST Hurricane Maria Program | Technical Update (July 2025)
The National Institute of Standards and Technology (NIST) has released a video update (above), presentation slides, and a press release on its study of Hurricane Maria's impacts on Puerto Rico. 

This page presents progress in NIST’s study of Hurricane Maria’s effects on Puerto Rico, which will have implications for communities across the U.S. Highlights of completed tasks are presented, along with links to resources where more details can be found. As described below, these resources include a progress report, published in both Spanish and English, as well as presentations by the NIST team to the National Construction Safety Team (NCST) Advisory Committee.

Highlights

HM Progress Report Cover

Highlights of tasks completed by the NIST team and supporting contractors include:

  • Wind tunnel testing to evaluate the effects of Puerto Rico’s mountainous topography on local wind speeds and on the resulting wind loads experienced by selected critical buildings.
  • Improvements to the hurricane wind-field model to provide best estimates of peak gust wind speeds across Puerto Rico, incorporating additional surface-level meteorological observations and using an improved process to optimize the model fit. The wind-field model dataset has been published here: https://doi.org/10.18434/mds2-3184.
  • Surveys and interviews on emergency communications and public response, including surveys of more than 1,500 households, follow-up interviews with 60 households, and interviews with 35 professionals who provided emergency communications to the public, to deepen the understanding of emergency message content, how the public receives weather watch and warning information, and what leads to protective action decisions.
  • Site visits, staff interviews, and document review for 5 hospitals and 5 shelters for evaluation of building performance, including damage sustained and impacts on function and operation.
  • Interviews with 30 hospital staff and 410 next-of-kin to better understand how damaged buildings and failures in supporting infrastructure, as well as social-environmental conditions, played a role in injuries and deaths following Hurricane Maria.
  • Surveys of more than 300 schools and 16 hospitals on impacts to and recovery of social functions associated with education and healthcare organizations.
  • Surveys of more than 450 small and medium-sized businesses (in manufacturing, retail, and service sectors) and interviews with 30 shipping and transportation representatives on preparedness, impacts, and post-hurricane recovery. 

Data collection for the Hurricane Maria NCST Investigation – as well as for projects focused on recovery of schools and hospitals, business and supply chains, and power, water, and transportation infrastructure –  has been completed, and data analysis is well underway. Following the completion of data analysis, the NIST team will publish draft reports with findings and recommendations for public comment. Beyond publishing reports, NIST will follow through on its long-term commitment to promote the implementation of its recommendations for improvements to codes, standards and practices throughout the U.S.

After Hurricane Fiona struck Puerto Rico on September 18, 2022, NIST concluded that collecting information about that event could strengthen its findings and recommendations related to Hurricane Maria, as well as providing insights on the long-term recovery of infrastructure systems and the critical social functions provided by schools and hospitals. Extension of the Hurricane Maria Program to consider impacts of Hurricane Fiona is being supported by funds appropriated through the Disaster Relief Supplemental Appropriations Act passed by Congress in December 2022. An update on NIST's work related to Hurricane Fiona was presented to the NCST Advisory Committee in September 2024.

Advisory Committee Updates

NIST provides regular updates on its Hurricane Maria projects to the National Construction Safety Team Advisory Committee. The following is a listing of presentations to the NCST Advisory Committee that provide details on the preliminary reconnaissance, plans, and progress of the Hurricane Maria Program. Links to the full presentations are provided.

Progress Report

In January 2021, NIST published a report summarizing progress in its multi-year study of Hurricane Maria’s impacts on Puerto Rico and subsequent recovery processes. Further details are provided at the following links:

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Created March 22, 2018, Updated July 22, 2025
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