(CNN)For years, Erika Lenkert's 14-year-old daughter has spent four days a week at Lenkert's house in San Francisco and three days a week at her dad's place in Marin County, about a 30-minute car ride north.
Navigating child custody in the time of coronavirus
But amid the Covid-19 pandemic, the family's custody arrangement has been anything but regular.
The girl's father is dating a clinician who is working the front lines at an area hospital, and neither parent was comfortable with the possibility of increased exposure.
So Lenkert and her ex talked, and they agreed to temporarily modify the custody agreement until the public health threat diminishes. The teenager has been living in San Francisco full-time ever since.
"We wanted to minimize the potential for her to get exposed and the ripple effect that could cause," says Lenkert, an editorial services director. "[She] misses her dad but understands the rationale."
Across the country, divorced parents are grappling with similar situations and equally difficult decisions. Shelter-in-place orders, regional lockdowns and overarching health concerns have forced parents to modify their usual custody schedules and rewrite routines.
In cases like Lenkert's, where the relationship is amicable, the changes have gone relatively smoothly. In other cases where parents are estranged, improvisation has necessitated billable hours with divorce attorneys and unearthed old wounds, making an already stressful time even harder.
This anxiety is only exacerbated by a family court system that basically has shut down like all other non-essential parts of society.
"Every day, all day long — it's the number one issue we've dealt with in our office over the last three weeks," said Jodi Lazar, a divorce and family lawyer in Austin, Texas. "I'm sure it will be number one for the foreseeable future."
One part of the current custody challenge is logistical. Many divorced parents who live close to each other exchange kids at schools or workplaces, most of which are closed. What's more, parents who live in separate towns risk violating shelter-in-place orders if they go too far out of their way to drop-off or pick-up a child.
As for parents who live in different states? Most would agree it's too risky right now to have children fly alone.
Another part of the conundrum is medical. How do you know your ex is taking social distancing as seriously as you are? How do you know your ex's new partner is keeping himself or herself safe enough not to infect your child? These are legitimate questions that many divorced parents are asking right now.
"I'm not worried about [my ex-wife] exposing our kids to risk, but I have thought about variables I can't control when they're there," said Jason Schoenfelder, a single dad in Chicago.
Schoenfelder's girls, ages 10 and 7, usually split their time evenly between his place and their mother's house. But because she works in a hospital, they've been spending more time with him.
"I think it's natural for a single parent to wonder, 'How safe are my kids going to be when I'm not controlling the environment?' But ultimately I trust that their mom has their best interests in mind," Schoenfelder said.
The biggest obstacle for divorced parents during the coronavirus pandemic is legal. Most state and county family courts are closed, or open only for emergencies involving abuse or endangerment. This means that even if parents wanted to formally modify pre-existing custody agreements, they can't.
Lazar, the Austin attorney who specializes in family law, said the Texas Supreme Cour