Kentucky Gov. Andy Beshear tweeted a dire update on the state's COVID-19 cases.

The state health department reported that 2,014 people are currently hospitalized with the virus, 589 of whom are in intensive care units and 338 are on ventilators. Beshear said these are record numbers.

"Folks, this is dangerous. Please, get vaccinated and mask up indoors," the governor tweeted.

Oregon Gov. Kate Brown announced a new mask requirement for outdoor activities.

The order, which goes into effect Friday, applies to all residents regardless of vaccine status during "outdoor settings in which individuals from different households are unable to consistently maintain physical distance."

"The rule does not apply to fleeting encounters, such as two individuals walking by one another on a trail or in a park," the governor's office said in a news release.

Outdoor gatherings in private residences are also exempt.

Brown cited the growing number of COVID-19 cases in the state fueled by the delta variant as the motive behind the rule.

The U.S. Centers for Disease Control and Prevention revealed new COVID-19 forecast models Tuesday that showed daily hospitalizations could more than double by mid-September.

By Sept. 20 the U.S. could see hospitalizations as high as 27,000 a day, according to the agency's models. Currently the seven-day average of COVID-19 related hospitalizations is 12,190, according to the CDC.

The peak seven-day average was 16,492 in January, according to health data.

The low-end of the CDC's forecast's models is 7,800 hospitalizations a day.

Health officials stress that a change in behavior, including masking, vaccination and social distancing, will reduce severe illness and hospitalization.

-ABC News' Brian Hartman

There are currently no COVID-19 intensive care unit beds available in the state of Arkansas, a situation Republican Gov. Asa Hutchinson referred to as a "cautionary note for everyone" Tuesday.

"It fluctuates day by day. But right now, because of the increased number of COVID patients that need that type of ICU care, those beds are full," Hutchinson told reporters.

There are still ICU beds available for non-COVID patients, Hutchinson noted.

Arkansas lags behind the national average in vaccinations. As of Monday, 52% of residents had received at least one dose, and 40% were fully vaccinated, according to the Centers for Disease Control and Prevention. By comparison, 61% of Americans have gotten at least one shot and 52% are fully vaccinated.

-ABC News' Libby Cathey

Columbia University pediatrician Dr. Edith Bracho Sanchez spoke with ABC News' Linsey Davis about the importance of getting a COVID-19 vaccine during pregnancy and while nursing.

Recent health data from the U.S. Centers for Disease Control and Prevention has shown that three out of four pregnant women in the U.S. are unvaccinated, and the numbers are lower for Black pregnant women, with nine out of 10 unvaccinated.

Sanchez, who is eight months pregnant and vaccinated, told ABC News that expecting mothers are more vulnerable to diseases and the current data shows the vaccines are safe for them.

"We now know from over close to 40,000 women that there is no increased risk of miscarriage of early delivery of your baby, which are the things that worry a lot of pregnant women," she said.

Sanchez said she did not hesitate to get her shots once she became eligible.

"I really, really hope that pregnant women out there hear this call and go ahead and get themselves this vaccine and protect themselves, their baby and their pregnancy," she said.