Mikvah options during Corona

Dear Rabbi Abadi,

My wife is unable to go to the mikvah due to coronavirus restrictions.  I have heard that in a sha’at had’chak situation such as this one, there might be other options that are satisfactory.  We do have a hot tub in our backyard that is not currently operational but could be filled up according to your instructions.  Please let me know about this and any other options.  We very much want to keep the laws of taharat hamishpacha,  but also want to make sure not to endanger my wife or anyone else. Thank you so much.

Chaim