The state has become the new national epicentre for the virus, accounting for around a fifth of all new cases in the US as the highly contagious delta variant of the coronavirus continues to spread.

Republican Florida Governor Ron DeSantis has resisted mandatory mask mandates and vaccine requirements, and along with the state Legislature, has limited local officials' ability to impose restrictions meant to stop the spread of COVID-19. DeSantis on Friday barred school districts from requiring students to wear masks when classes resume next month.

The latest numbers were recorded on Friday and released on Saturday on the US Centers for Disease Control and Prevention's website. The figures show how quickly the number of cases is rising in the Sunshine State: only a day earlier, Florida reported 17,093 new daily cases. The previous peak in Florida had been 19,334 cases reported on January 7, before the availability of vaccinations became widespread.

The state reported 409 deaths this week, bringing the total to more than 39,000 since its first in March 2020. The state's peak happened in mid-August 2020, when 1,266 people died over a seven-day period. Deaths usually follow increases in hospitalisations by a few weeks.

DeSantis has blamed the surge on a seasonal increase — more Floridians are indoors because of the hot weather with air conditioning circulating the virus. About 60 per cent of Floridians 12 and older are vaccinated, ranking it about midway among the states.

The Florida Hospital Association said Friday that statewide COVID-19 hospitalisations are nearing last year's peak, and one of the state's largest health care systems, AdventHealth's Central Florida Division, this week advised it would no longer be conducting nonemergency surgeries in order to free up resources for COVID-19 patients.

Universal Orlando Resort and SeaWorld on Saturday became the latest theme park resorts in Florida to again ask visitors to wear masks indoors, with Universal also ordering its employees to wear face coverings to protect against COVID-19, which has been surging across the state.

All workers at Universal's Florida park on Saturday started being required to wear masks while indoors as the employees returned to practicing social distancing. The home to Harry Potter and Despicable Me rides also asked visitors to follow federal and local health guidelines by voluntarily wearing face coverings indoors.

“The health and safety of our guests and team members is always our top priority,” Universal said in a statement.

Health officials on Friday announced that coronavirus cases in Florida had jumped 50 per cent over the past week with COVID-19 hospitalisations in the state nearing last year's peak.

SeaWorld on Saturday posted on its website that it was recommending that visitors follow recently updated federal recommendations and wear face coverings while indoors.

The change in policy this week at the theme park resorts came after the US Centers for Disease Control and Prevention recommended that everyone wear masks indoors, regardless of vaccination status.

Crosstown rival Walt Disney World started requiring employees and guests older than 2 to wear masks on Friday, but it also went a step further. The Walt Disney Co. said in a statement that it would be requiring all salaried and non-union hourly employees in the US who work on site to be fully vaccinated.

Disney employees who aren't already vaccinated will have 60 days to do so and those still working from home will need to show proof of vaccination before returning. Disney said it was discussing the vaccine requirements with the union, and added that all new hires will be required to be fully vaccinated before starting work at the company.