In the wake of last month’s devastating earthquake in Turkey and Syria, Los Angeles County has identified some 33 important structures it says are the most at risk during a major seismic event of that magnitude.

Last week, the Board of Supervisors published a list of at-risk properties owned by the county that must be upgraded in line with modern standards over the next ten years, according to KTLA.

The county has already mandated changes to its building codes that call for similar upgrades to all non-ductile concrete high-rises and soft-story residential structures before the year 2033. Officials are wary of the “Big One” — a magnitude 7.8 or above quake — that would kill as many as 1,800 people and destroy an estimated 2,000 structures in the area per the U.S. Geological Survey (USGS).

“We never thought that spending the money on retrofitting these buildings was worth the risk,” USGS Seismologist Dr. Lucy Jones told KTLA. “When we modeled what would happen in a big San Andreas, more than half the deaths from the earthquake itself are in these types of buildings. So, every one of them is a problem.”  

The Board of Supervisors' main Hall of Administration building is among the structures listed, along with several libraries and multiple parking garages. The oldest structure listed is the LAC+USC Medical Center-Pharmacy Building from 1917. None of the buildings on the list were constructed after 1977, the year after an updated Uniform Building Code was adopted by the city.

The LA Times has a comprehensive rundown of all the concerning structures here.