Trainman

Question: Why is Las Vegas left abandoned for five years as shown on the screen by Dr Emma Russell when it was damaged by the MUTO? Why can't everyone just fix the damage to the city so the tourists can go there again or even repopulate it?

Trainman

Answer: I don't remember if either Godzilla 2014 or Godzilla: King of the Monsters directly said that this was the case, but the MUTOs were feasting on nuclear radiation and warheads, meaning that their presence and deaths in the area would most likely unleash a ton of radiation. Radiation can make entire areas uninhabitable for years.