Spud cannot avoid his obligations under the contract since the emergency did not make the performance impossible.
Once he has signed the contract, he is bound to complete the contract. There is no such emergency relief in contracts.
If he was expecting some other better job, he should not have signed the contract. but once he has undergone the contract terms and conditions, he is legally bound to make it happen.
Besides the legality, it is his moral and ethical responsibility as well to finish the job he has signed for.