Confirmed coronavirus cases are rising in 40 out of 50 states

The number of confirmed coronavirus cases per day in the U.S. climbed to an all-time high of more than 50,000 on Thursday, with the infection curve rising in 40 out of 50 states in a reversal that has largely spared only the Northeast.

In another alarming indicator, 36 states are seeing an increase in the percentage of tests coming back positive for the virus.

“I think we are going to be in a very difficult situation for at least a month,” said Dr. Mary Jo Trepka, an epidemiologist at Florida International University, in one of the hardest-hit states.

The surge has been blamed in part on Americans not wearing masks or following other social distancing rules as states lifted their lockdowns over the past few weeks.

The U.S. recorded 50,700 new cases, according to a tally kept by Johns Hopkins University. That represents a doubling of the daily total over the past month and is higher even than what the country witnessed during the most lethal phase of the crisis in April and May, when the New York metropolitan area was easily the worst hot spot in the nation.

All but 10 states are showing an increase in newly reported cases over the past 14 days, according to data compiled by the COVID Tracking Project, a volunteer organization. The outbreaks are most severe in Arizona, Texas and Florida, which together with California have re-closed or otherwise clamped back down on bars, restaurants and movie theaters over the past week or so.

The surge comes as Americans head into a Fourth of July holiday that health officials warn could add fuel to the outbreak by drawing big crowds. Many municipalities have canceled fireworks displays. Beaches up and down California and Florida have been closed.

Florida reported more than 10,000 new cases for the first time Thursday. That is six times higher than the daily count of less than a month ago. The state also reported 67 deaths for the second time in a week and 325 new hospitalizations, one of the biggest 24-hour jumps in Florida yet.

Chandan Khanna / AFP via Getty Images People enjoy the weather in Miami Beach, Fla., on Thursday. Florida on Thursday reported a record of more than 10,000 new coronavirus cases, as it struggles to rein in the virus's spread, blamed in part on young people congregating in the state.