empeorar in English:

They were apprehensive that the situation would worsen.

situation worsens

The situation in our country is getting worsen

His condition suddenly worsened last week.

These options would actually worsen the economy and add to the deficit.

The weather worsened; It only worsened the situation

You must contact a doctor if your symptoms worsen or do not improve after 3 days

Thank goodness it didn't worsen. But please don't push yourself yet.