Upvote:0
I believe the safest way to get back home is to apply for an Emergency Passport.
US Embassy Website
This is about US Embassy in Poland but I'm pretty sure it works the same way in every country. Check Emergency Passport
section:
The U.S. Embassy in Warsaw can issue emergency passports in certain limited circumstances. These passports have very restricted validity and are generally issued only to enable stranded citizens to return home. Persons who need emergency passports should apply during regular working hours and should follow the regular instructions for the type of passport that pertains to them. Provided that everything is in order emergency passports are issued within 1-2 hours, however in certain situations the waiting time may be longer.
Upvote:2
If you fly directly from Canada, or enter the US by land/sea, you can use your NEXUS card to enter the US.
Otherwise you need a valid US passport.
Upvote:3