Verb conjugation of "empeorar" in Spanish

The bus left Havana and drove westwards towards a place called Viniales. After a short two hour ride we arrived there and once the bus entered the terminal we were greeted by dozens of people.
If that gets out of control (riots or support for radicals), there may flourish a steady ground on which the mentioned could reoccur. Then after a while this turns to be nationalism on a larger scale.
To be honest, we did not understand one word of what he was saying, because his English was so terrible. Or maybe it wasn't and it was only his accent which we could not grasp. To us it was Chinese.