Updated 8/5 at 5:02 p.m.

Maryland Gov. Larry Hogan says the state is at a “fork in the road” in its coronavirus recovery.

Maryland’s caseload is far lower than it is in states where COVID-19 is spiking, but Hogan said at a press conference Wednesday that he’s concerned about a rise in hospitalizations—up nearly 30% in the last two weeks. As a result, Maryland will not move forward with further reopening until numbers look better. Further, Hogan announced an expansion of mask requirements and a new advisory for out-of-state travel.

Maryland will issue an advisory that strongly discourages travel to or from any states with COVID-19 test positivity rates of 10% or higher. That includes Florida, Texas, Georgia, Louisiana, Arizona, Alabama, South Carolina, Nebraska and Idaho.

The advisory applies to personal, family, or business travel of any kind, Hogan said. And “if you absolutely must travel to one of those locations, you are strongly advised to immediately get tested for COVID-19 and self-quarantine while awaiting test results.”

D.C. has issued a similar order.

In a press conference Wednesday, Hogan also announced that he would expand statewide mask requirements. Beginning July 31, Marylanders will be required to wear masks in the public spaces of all businesses. Masks will also be required in all outdoor public spaces whenever it is not possible to remain physically distant from others.

Hogan said the decision to expand the mask orders was “fact-based, apolitical, and solidly grounded in science. And while it can be an inconvenience, especially in the heat, wearing a mask is the single best mitigation strategy that we have to fight the virus, and the science and the data are very clear.”

COVID-19 cases are spiking in many states across the country. Hogan said Maryland’s numbers looked better; He pointed particularly to the fact that Maryland’s statewide test positivity rate has remained under 5%, the target put forward by the Centers for Disease Control and Prevention, for more than 30 days. Three counties–Baltimore County, Baltimore City, and Prince George’s County–have reported positivity rates above 5%.

“However, we do find ourselves at a fork at the road, a critical turning point where we could either continue making progress or continue heading in the right direction, or we could ignore the warnings and spike back up like the rest of the country,” Hogan said.

Hogan pointed to a few concerning indicators, which led him to decide to pause reopening and not move forward into Phase 3.

Particularly concerning to Hogan was a rise in hospitalizations, which Hogan said were up 28% over the past two weeks. The uptick in acute care bed use in the state, Hogan said, is largely coming from younger patients.

Hogan said these younger patients were not suffering the same severe complications as older residents were at the virus’s peak in the late spring, but were “troubling nonetheless” and “further proof that this virus can impact anyone, anywhere, at any age.”

Hogan said in recent weeks there has been a “dramatic shift” in the age of those becoming infected. Now, more than 50% of new reported cases of COVID-19 in Maryland are for residents under the age of 40 — and the test positivity for residents under 35 is rising.

Maryland’s contact tracing efforts have also begun to yield some data about where and how residents might be contracting the virus. Hogan announced Wednesday that more than 50% of people interviewed as part of contact tracing were working outside their home. Of those who indicated they had gone to work in the past two weeks, 25% were health care workers, and 23% said they worked in offices with non-public-facing jobs. 13% had public-facing jobs, and 12% worked in the restaurant and food service industry.

Hogan said that certain activities linked a number of reported coronavirus cases, too. Of people who answered contact tracers’ questions about their activity, 44% had attended a family gathering. The next most common activity was house parties, which 23% of people who responded said they attended. 21% said they had attended outdoor events.

For Hogan, the data around family gatherings was particularly notable.

“For most of us, I think there’s a false sense of security when you’re spending time with family and friends, especially if you’re at home or in a backyard barbecue,” Hogan said. “I think I’m guilty of this myself.”

This story was updated to clarify data about the activities of Marylanders who recently tested positive for COVID-19.