I read the article at the link you posted. Whoa nellie! My house and land are sitting at the lip of the volcanic ring dike mentioned as part of the igneous intrusion. If there's anything to this, we may be the first ones to know it if it happens!
I wouldn’t get too worried. People live very near both geothermal and volcanic activity that is an awful lot more dramatic than anything you will see in Arkansas. Add to that you will almost certainly get years of warnings if something is fixing to happen.
Your biggest threat is still the New Madrid, not turning into Yellowstone overnight.
A good bet would be to keep an eye on the trees on either side of the Arkansas River. If they get a big die off, it probably means that there is a fumerole underneath or nearby to the river, and toxic gas is percolating up through the soil. Toxic, mind you, can mean ordinary CO2, that just kills the tree roots, which has happened elsewhere.
But to kill bottom fish, it would probably be an acid gas. That’s probably what bleached the soil near Hell’s Half Acre near Hot Springs.
Bottom line, you aren’t sitting on a bomb. You are sitting on a really big cork. And a lot has to happen before a cork blows out of the bottle.