Portions of North Dakota, Montana and Minnesota are all bracing for wind chill temperatures that could plunge to -30 degrees or below as a high-pressure system makes its way south, bringing an Arctic ...

The "safest" states' exposure ranges from 0.001 Gy to 0.5 Gy, compared with the states in the most danger (Montana, Wyoming, Colorado, Nebraska, South Dakota, North Dakota, Iowa and Minnesota), where ...