As all the countries US is also very sensitive to the natural disasters. It consists of the best technology which can assist in the construction and maintenance of the buildings which are mostly natural disaster proof but that's not the case always.
This country has experienced 3 Category 5 hurricanes since 1934, 58 T5 tornadoes since 1950, and 1,319 earthquakes with a 5.0 magnitude or higher since 1900.
most of the new constructions what are there are strong enough to tackle the nature's disasters but what about the old buildings which are vulnerable and can be damaged with a strong tornado or a violent earth quake. Life loss which could happen in these cases are higher.