[electromagnetic]

They're too high to live in (for human standards) and far too high to cultivate food in.

However, for a week visit you're likely to have no more exposure than a chest x-ray. Also the measures they're proposing would certainly help. It sounds like the 'tourist' portion where you're outside exploring you're likely wearing something akin to disposable scrubs to mitigate the radiation inside the buildings (where you're likely to spend 1/2 your time anyway).