The agency says it will not report preliminary findings before issuing its final report unless investigators discover issues that would impact public safety.
A 24-hour rainfall total of 17.02 inches was recorded, nearly half during a six-hour midday window, but other radar showed amounts of 21 inches or more and 21 storm-related deaths are confirmed as of Aug. 23.
Structural engineers call for more in-depth inspections of coastal buildings in harsh corrosive climates, and offer recommendations that go beyond visual surveys.