Reduce your 401(k) deferral
While this approach is usually not considered a prudent strategy, it may become necessary in an extraordinary financial emergency. If feasible, you can consider reducing your contributions to the employer-match level.
This would at least be a better option that making an emergency withdrawal or taking out a loan. In any case, you should be aware that several erstwhile restrictions related 401K withdrawals have now been removed under the CARES Act to extend financial support to the people.