Boston urged people to start wearing masks Thursday and the Biden administration weighed its next legal step in what is shaping up to be a high-stakes court fight over the abrupt end of the national mask mandate on airplanes and mass transit.

The Boston Public Health Commission noted a rise in hospitalizations, as well as a 65% increase in cases and an even larger spike in COVID-19 levels in local wastewater samples. It also stressed that the guidance was merely a recommendation, not an order.

The country is wrestling with how to deal with the next phase of the pandemic and find the right balance in enacting health measures at a time when many Americans are ready to move on after two exhausting years.

A federal judge in Florida this week threw out a national mask mandate on mass transportation, and airlines and airports responded swiftly Monday by repealing their requirements that passengers wear face coverings. That put the Biden administration in the position of trying to navigate an appeal that could have sweeping ramifications over the power that the Centers for Disease Control and Prevention has in regulating future health emergencies.