Is there an emergency fuel shut off switch on a 1997 Jeep Wrangler?

No, a 1997 Jeep Wrangler TJ does not have a readily accessible, easily-operated emergency fuel shut-off switch as standard equipment. While there might be a fuel pump relay you could disconnect in an emergency, this isn't a simple switch like you might find on some other vehicles. Disconnecting the fuel pump relay requires some mechanical knowledge and access under the dash.