Probably not too wise to try to drive out since it sounds like you will be stuck in traffic.
However, I understand that the TDOT is fixing to open up both sides of IH 45 north towards Dallas. I cant confirm it, however.
Probably your best bet is to book a flight if you can. Your hubby will learn.
She's almost out of the city going northwest. SHe'd have to go east-southeast to get to the airport, not a sure bet at all.