The rollback applies to 19 counties across California that have been on the state's COVID containment "watch list" for three consecutive days. The impacted counties are those seeing the most serious uptick in infections, and include nearly all of Southern California, though not San Diego, which is faring better.
Those 19 counties cover 72% of California residents, and the list includes Los Angeles, Sacramento and San Joaquin counties.
Bars in the 19 counties were also directed to cease operations altogether, an expansion from the seven counties where bars were shut down by the governor's orders on Monday.
Additionally, Newsom tweeted that all parking areas for state beaches in Southern California and the San Francisco Bay Area will be shut down as well for the upcoming holiday weekend.
"We want to again remind each and every one of you that if we want to be independent from COVID-19, we have to be much more vigilant in terms of maintaining our physical distancing from others and be much more vigilant as it relates to being in situations where we are transmitting COVID-19", he said.
You can find the most recent California coronavirus numbers at this website.
A closure sign is posted at the entrance of a park Wednesday
Newsom said the initial focus with the new closure order will be education, but there will be multi-agency "strike teams" to handle enforcement, targeting non-compliant workplaces.
Newsom said that he expects all 19 will come into compliance with state orders, but noted that the state will step in if needed to make that happen. The closures will last for at least three weeks.
For most people, the new coronavirus causes mild or moderate symptoms, such as fever and cough that clear up in two to three weeks.
"When we talk about compliance, this isn't just talking about mask compliance, this is talking about health and safety in our meat-packing facilities", Newsom said. "Under our current shelter in place order, the majority of businesses, large and small, are open". For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia and death.
The new restrictions are part of efforts by Californian officials to reduce chances for people to gather indoors leading up to and over the Fourth of July weekend. #COVID19 does not take 4th of July off.
"L.A. County's really at a critical juncture in the pandemic", said Barbara Ferrer, the L.A. County public health director.
"I know we're exhausted".
Before Newsom announced the new restrictions today, he also extended some programs to ease the harsh economic toll of the virus, though largely keeping with a strategy to leave it up to local officials to decide what to ultimately implement.