Shafaq News / U.S. health experts on Thursday urged Americans to prepare for severe disruptions in coming weeks as the rising wave of COVID-19 cases led by the Omicron variant threatened hospitals, schools and other sectors impacting their daily lives.

The warning came as the United States reached a record high in COVID-19 cases, while federal officials issued more travel warnings and reportedly prepared to authorize booster shots for 12 to 15-year-olds next week.

For the second day in a row, the United States had a record number of new reported cases based on the seven-day average, with more than 290,000 new infections reported each day, a Reuters tally showed.

At least 18 states and Puerto Rico have set pandemic records for new cases, according to the tally. Maryland, Ohio and Washington, D.C., also saw record hospitalizations as overall U.S. COVID-19 hospitalizations rose 27%.

The surge comes amid increased holiday travel, with New Year's celebrations still to come, and as schools grapple with students' return to classrooms following winter breaks.

"We are going to see the number of cases in this country rise so dramatically, we are going to have a hard time keeping everyday life operating," Dr. Michael Osterholm, an infectious disease expert at the University of Minnesota, told MSNBC.

U.S. health officials have said early data show Omicron appears less severe but have continued to push vaccinations, masks and physical distancing. The Centers for Disease Control and Prevention (CDC) has also issued new guidelines shortening isolation and quarantine periods, which have been criticized by some disease experts and health care workers.