Del. Kathy J. Byron, R-Bedford, the commission’s chair, asked Jacqueline K. Cunningham, the state’s commissioner of insurance, if she has had any indication that any carriers plan to drop out before Wednesday. Cunningham said no.

The rate increases can be attributed to an unstable market, with too few healthy people signing up to balance out the number of sick people who enroll, and the uncertainty of cost-sharing reduction payments, which are meant to go to insurers to cover the cost of offering lower prices to poor members, but which the federal government has refused to guarantee.

Even if the federal government comes forward in the next few months and promises to pay insurers the cost-sharing reductions, the prices for 2018 will be locked and unable to be changed, Shea explained.

“What you’re saying is, because no one has made the decision one way or another ... people who need health care insurance are victims beyond their control,” said Sen. Rosalyn R. Dance, D-Petersburg. “Even if it’s corrected, they’re still held hostage for 2018.”

To complicate the situation further, Enroll Virginia, the navigator group designated to help Virginians maneuver the marketplace, has seen its budget cut by 54 percent.