Worldwide coronavirus cases top 30 million

In Texas -- which has the second highest number of coronavirus cases in the U.S. -- most of the state will allow businesses to operate at 75% capacity, up from 50%, beginning on Monday.

Rules for reopening are based on Texas' 22 "hospital regions." Nineteen of the 22 regions have less than 15% of hospital patients diagnosed with COVID-19, so those regions can reopen restaurants, retail, offices, museums, libraries and manufacturing at 75% capacity.

The only parts of the state where businesses cannot reopen at 75% capacity are the Rio Grande Valley, the Laredo area and the Victoria area. To qualify for a 75% capacity reopening, those locations must get their hospitals to under 15% COVID-19 patients for at least one week.

Bars across Texas are required to stay closed because they are "nationally recognized as COVID spreading locations," said Gov. Greg Abbott.

California has the most COVID-19 cases of any state, with more than 772,000 people diagnosed, while Texas ranks No. 2 with over 696,000 cases, according to Johns Hopkins data.

ABC News' Matt Fuhrman contributed to this report.

All travelers arriving at Abu Dhabi International Airport are required to undergo thermal screening, take a COVID-19 test and self-quarantine for two weeks.

After clearing immigration, those who arrive will also be required to wear a free, medically approved wristband during their self-quarantine, Etihad Airlines confirmed in a statement to ABC News.

Only United Arab Emirates (UAE) nationals are allowed to fly into Abu Dhabi International Airport. UAE nationals arriving at the airport would be exempt from wearing wristbands if they hold diplomatic passports, are under the age of 18, over the age of 60, or have a chronic disease.

According to the UAE government portal, authorities in Abu Dhabi have been using the technology to track and monitor people diagnosed with COVID-19 to make sure they are self-quarantining.

The UAE has over 81,000 COVID-19 cases and at least 402 fatalities, according to the state-run WAM news agency.

ABC News' Christine Theodorou, Clark Bentson and Ibtissem Guenfoud contributed to this report.

Alex Azar, Secretary of the Department of Health and Human Services, will testify before a House select subcommittee on Oct. 2 about the response to the pandemic.

This will be his first appearance before Congress since February.

According to the House Select Subcommittee on the Coronavirus Crisis, "The hearing will examine the Trump Administration’s unprecedented political interference in the work of scientists and public health experts at the Centers for Disease Control and Prevention and Food and Drug Administration, the Administration’s refusal to provide accurate and clear public health information, and the failure of the Administration to develop and implement a comprehensive national plan to contain the coronavirus, more than eight months into this public health emergency."

ABC News' Mariam Khan contributed to this report.

Three days before public schools in New York City were slated to reopen for in-person learning, Mayor Bill de Blasio announced a new timetable.

"It involves several phases," de Blasio said at a press conference Thursday.

Students in pre-K, 3-K and special education programs will resume in-person learning Monday, as scheduled. Those in K-5 and K-8 schools will now return to physical classrooms on Sept. 29, while middle and high schools won't open until Oct. 1.

Remote learning will begin citywide Monday for those whose in-person start dates have been pushed back.

It's the second time the mayor has delayed the start of in-person classes amid the coronavirus pandemic. De Blasio said his colleagues had reached out to him with "real concerns."

"They acknowledged progress has been made but more had to be done to make sure that things would be as strong as they needed to be," he said.

ABC News' Aaron Katersky contributed to this report.