People whose metabolic reserve is low often die when you stress them.

I saw a study claiming 440 excess deaths from the Los Angeles fires. I'll make an assumption that permanently moving old and health impaired people from the Fukushima exclusion zone had a similar increase in mortality. And then a bit of looking leads me to this.

"The evacuation itself also was not without severe consequences. The accident was in the winter, and the evacuation of 840 patients or elderly people in nursing homes and health-care facilities apparently resulted in 60 immediate deaths due to hypothermia, dehydration, trauma and deterioration of serious medical conditions (Tanigawa et al 2012) and upwards of 100 deaths in subsequent month"

https://iopscience.iop.org/article/10.1088/0952-4746/33/3/49...

Like the Grapes of Wrath where the family starts out for California and the grandparents both die on the way.