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Potentially at-risk concrete buildings More than 1,000 old concrete buildings in Los Angeles and hundreds more in the county may be at risk of collapse in a major earthquake, according to a Times analysis of public records. In many cases, public records are incomplete or don’t clearly state the building type. The precise locations are not displayed because more research is needed to determine the vulnerability of these buildings. The Times took an in-depth look at seven Los Angeles neighborhoods, including two downtown, identifying 68 buildings that records indicate are concrete. Only a closer evaluation by a structural engineer can determine the level of risk.
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L.A.’s hidden dangers
More than 1,000 concrete buildings in Los Angeles and hundreds more throughout the county may be at risk of collapse in a major earthquake, according to a Times analysis. Reporters took an in-depth look at seven L.A. neighborhoods, including two downtown. Explore the map for details on 68 surveyed buildings.
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Read the story | FAQ: Concrete buildings, earthquake safety and you
Surveyed buildings 
Potentially at-risk buildings 
Earthquake faults
*Floor counts can vary depending on whether documents included basements or penthouses; Some owner names are abbreviated for space.
Sources: Times reporting; Aerial images: Pictometry
Interactive: Len De Groot, Armand Emamdjomeh, Rong-Gong Lin II, Raoul Ranoa, Doug Smith, Rosanna Xia/Los Angeles Times
For the record, June 2, 2014:
More than three months after this database was initially published on Oct. 13, 2013, an update was made that inadvertently used incomplete information from a table that predated publication. As a result, between Jan. 24 and June 2 some responses from owners and other details were missing. The website now reflects the most up-to-date content, and The Times has noted each owner response that was affected by this data swap.