The latest delta surge is once again pushing hospital staffing to breaking points across the U.S.

In Alaska, Idaho, Oregon and Washington, some "facilities are experiencing substantial shortages of both clinical and support staff," according to a Department of Health and Human Services planning document obtained by ABC News Wednesday.

In hard-hit Missouri, many hospitals "don’t have the staff to support a surge without further modification to operational strategies," the document said.

At a Shreveport, Louisiana, hospital, where the number of COVID-19 patients are multiplying, nurse Melinda Hunt told ABC News, "To be honest, I probably cry most days at work. And I cry at home. I’m tired. I’ve been doing this a year and half. It feels like it’s never going to end."

The U.S. daily case average has climbed to more than 84,000, a 45.3% jump in the last week, according to federal data.

The daily case average is now more than seven times higher than it was six weeks ago.

All but three states are now reporting high (a seven-day new case rate ≥100) or substantial (a seven-day new case rate between 50-99.99) community transmission, according to federal data.

-ABC News’ Arielle Mitropoulos

The delta variant now accounts for 93% of all sequenced cases in the U.S., according to the latest CDC data, which was collected over the last two weeks of July.

Delta accounted for just 3% of cases sequenced in late May.

Across the Midwest, described as HHS regions 7 and 8, delta made up 97% to 98% of cases. This includes Iowa, Kansas, Missouri, Nebraska, Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming.

-ABC News’ Cheyenne Haslett

The World Health Organization is calling for a moratorium on booster shots until more people from low-income countries have received a vaccine.

Low-income countries have only been able to administer 1.5 shots for every 100 people due to lack of supply, Dr. Tedros Adhanom Ghebreyesus, WHO Director-General, said Wednesday.

A moratorium on boosters until at least the end of September will "enable at least 10% of the population of every country to be vaccinated," he said.

But White House press secretary Jen Psaki said in response that the U.S. doesn't have to choose.

"We feel that it's a false choice and that we can do both," Psaki said Wednesday.

The U.S. has ordered enough supply for every American to get vaccinated, plus get a booster shot, according to the White House. The U.S. has already pledged to donate 580 million doses to the international community by 2022.

-ABC News’ Sarah Kolinovsky and Zoe Magee