I've been following this and I'm waiting to hear whether it (pneumonic plague) has appeared here in the US.
As of this date, NO, it has not made the move to this country, but with air travel, it is only one flight away. Watch cities which have an international airport, but don't restrict your watch to only those cities. A carrier is just a likely to get on a bus, car, train and travel to other cities.
It might be a good idea to review our plans for medical isolation and be ready to change our daily habits, such as avoiding crowded public areas (malls, supermarkets, theaters, sporting events, etc.). It isn't time to do this, yet, but having plans in place make it easier to make a fast change in behavior.
Doing some online research would be wise, assuming your sources are both reliable and not censored "in the interest of public safety"... Paranoia is your friend...