I am uae citizen and I need to travel to Chicago...

We would like to inform you that because of the imposition of the ban to prevent the spread of the krona epidemic, the closure of all public and private institutions, and the closure of ports, it is not possible to leave now, except after the lifting of the state of emergency.
Consequently, it is possible to postpone the reservation for the ticket through the website of the company with which the reservation was made, in the event of expiry of the visa and the imposition of a ban in the country due to the state of emergency to limit the spread of Corona, the visa can be extended automatically
Meaning, if it is ended and the residence status cannot be corrected due to the emergency, no fines will be imposed on you in violation of the visa, and when the ban status is lifted, it can be renewed or leave the country without any restrictions on you

Yes, the American passport can be used on condition that it is valid for at least six months, and the visa can be obtained upon arrival if you are able to travel and leave Thank you