By Madeline Holcombe, Eric Levenson and Theresa Waldrop, CNN

(CNN) -- Wisconsin's governor on Tuesday warned of an impending crisis as the state continues to see coronavirus cases rise and its hospitals overwhelmed.

"There is no way to sugarcoat it, we are facing an urgent crisis and there is an imminent risk to you and your family," Gov. Tony Evers said.

Hospital beds in the state are 84% full, as well as 87% of intensive care unit beds, according to state data, as hospitalizations continue to escalate.

The state opened a hospital facility at the state fair grounds October 14, and five patients have been cared for there as of Tuesday.

More than 5,000 confirmed cases were reported in Wisconsin as of Tuesday, bringing the total number there to more than 200,000 -- a "tragic" and "concerning" milestone, Evers said. The state's death toll rose by 64 Tuesday, bringing the total to 1,852.

"The increasing cases, and our increase in deaths today are the largest single day increases we've seen throughout the course of this pandemic," said Andrea Palm, Secretary-designee of Wisconsin's Department of Health Services. "We must take significant and collective action."

The state's seven-day average of new cases has increased by more than 400%, Palm said. It took seven months for cases to reach 100,000 there, and only 36 days to hit 200,000 Evers said.

Evers' warning comes as nearly half a million Americans tested positive for Covid-19 in just the last week as a fall surge of the contagious virus claws its way into every region of the country.

More than 8.7 million in US infected since pandemic began

The past seven days have been marked by daunting coronavirus records and upticks, with 489,769 new cases reported since October 20.

In the US, more than 8.7 million people have now been infected since the pandemic began, according to Johns Hopkins University.

The fall resurgence has led some local and state officials to rein in their reopening plans, as hospitalization numbers increase and states report case records. Still, public fatigue and political unwillingness to require masks and restrict gatherings -- exemplified by the White House chief of staff's frank admission that "we are not going to control the pandemic" -- suggest worse days to come.

Dr. Scott Gottlieb, former commissioner of the US Food and Drug Administration, said on CNBC's "Squawk Box" on Monday that the US was at a tipping point, where aggressive action could stem the worst of the pandemic.

"But we're not going to do that and I understand why. There's a lot of fatigue set in and a lot of policy resistance to taking strong action ahead of, you know, the spread," he said.

"I think we're right now at the cusp of what's going to be exponential spread in parts of the country."

At 69,967 new cases per day, the 7-day average of new cases is at the highest levels since the pandemic began, bringing the national death toll to 226,524, according to data from Johns Hopkins.

If the current trend continues, the US could see 100,000 new cases per day, Dr. Ashish Jha, the dean of Brown University School of Public Health, said Tuesday.

Like Gottlieb, Jha said that could be avoided, but "there's just not enough policy impetus to act as we need to, and I'm worried we're going to hit 100,000 in a day at some point in the coming weeks," Jha said.

And state numbers are worrisome too: 37 states are reporting at least 10% more new cases in the past week compared to the previous week, and 21 states saw their highest 7-day averages on Sunday.

In all, 29 states have reported at least one record high day of new cases during the month of October, according to Johns Hopkins University data.

The increase in cases is not because of more testing but because of more infections, said Admiral Brett Giroir, the White House coronavirus task force testing czar, a position contrary to President Trump's comments.

"Testing may be identifying some more cases, I think that's clearly true, but what we're seeing is a real increase in the numbers," Giroir said Tuesday during a Washington Post live event.

Public health measures like mask wearing, avoiding crowds, physical distancing and hand hygiene make a difference, as they did in Arizona, Florida, Texas and across the Deep South, he said.

Some officials reinstate restrictions

Officials from New Jersey to Denver to Idaho are responding to the bad news by rolling back reopening plans.

With 1,223 new cases and 948 hospitalizations on Monday, New Jersey is experiencing a spike, Gov. Phil Murphy said.

Newark, which is in the counties with the top five case counts, will begin implementing restrictions including closing non-essential businesses by 8 p.m. starting Tuesday, according to a press release.

"This is not the first time COVID-19 has threatened our city and its residents at this magnitude and once again, we will meet this challenge with determination and guided by data," said Newark Mayor Ras Baraka in the statement.

In Massachusetts, 13 communities are rolling back their reopening plans as well after the state reported more than 1,000 new cases for three days in a row.

The communities are going back to step one of Phase 3 of the state's plan, which closes many indoor recreation businesses, reduces occupancy in establishments like gyms and museums to 40%, restricts outdoor gatherings at event venues to 50 people and reduces outdoor performances to 25% capacity.

In Idaho, even though Gov. Brad Little said the economy will remain open, the state moved back from Stage 4 of the reopening plan to Stage 3.

"It doesn't mean in-person church will end. It doesn't mean we're restricting travel in or out of the state," he added. "It especially doesn't mean that we should go to for remote learning in our schools."

Yet other states have resisted taking more serious restrictions or requiring people to wear masks, which are proven to limit the spread of the virus.

For example, Dr. Deborah Birx of the White House coronavirus task force lambasted mask usage in North Dakota during a stop in Bismarck Monday.

"Over the last 24 hours as we were here and we were in your grocery stores and in your restaurants, and frankly even in your hotels, this is the least use of masks that we have we seen in retail establishments of any place we have been," Birx told local reporters, according to the Bismarck Tribune. "And we find that deeply unfortunate because you don't know who's infected and you don't know if you're infected yourself."

There is not currently a mask mandate in North Dakota -- one of 15 states without such policy. The state has the highest rate of infections per 100,000 people, according to Johns Hopkins University data.

Halloween plans change as infections rise in children

As coronavirus cases rise across the nation, the impact on children has grown.

Over the past two weeks, the amount of cases among children has increased by 14%, The American Academy of Pediatrics said Monday.

The group, which represents pediatricians, says about 792,188 children have been infected in the US as of October 22. And the AAP said 94,555 new cases among children 17 and under were reported from October 8 to October 22.

To stay safe and prevent infection, children may not be able to celebrate Halloween the way they are used to this year, the US Centers for Disease Control and Prevention said

"There are lots of ways to celebrate the spooky season that are safer than traditional activities," Dr. Michael St. Louis of CDC's Community Guidance Team said on a call with community leaders.

Options include virtual costume parties, scavenger hunts for candy, small outdoor and distanced gatherings and one-way trick or treating, where candy is placed at the end of the driveway for children to collect, he said.

People may have to find creative ways to incorporate face masks into their costume this year, St. Louis noted.

"It's important to understand that a costume mask is not a substitute for a cloth face mask, unless it has two or more layers of breathable fabric and fits snugly around the nose, mouth and under the chin," he said.