The United States Government provides humanitarian programs to help people who need help due to disasters, oppression, and other emergencies.
Some of the humanitarian programs are:

Victims of domestic violence – WAVA
Certain victims of domestic violence may be eligible to file a petition for permanent residence for themselves, without the knowledge or support of the abuser.

Deferred Action for Childhood Arrivals – DACA
This option is available for certain people who came to the United States as children and meet certain requirements. The Deferred Action does not provide a lawful status, but the qualified applicant is eligible to obtain a work authorization.

Family reunification programs

This program allows the relatives of some American citizens or permanent residents of the United States to come into United States without having to wait for their immigrant visa process to be completed. The beneficiaries of this program may obtain a work permit.

Refugee and Asylum
The United States government may grant the status of refugee or asyleeto a person who has been persecuted or can be persecuted in the future due to the person‘s race, religion, nationality, or membership in certain social or political group. Refugee status is granted to persons who are outside the United States, while the asylee status is awarded to people who are in the United States or are seeking admission at a port of entry into the United States.

Temporary Protected Status – TPS
The Government of the United States can establish that citizens of certain countries can benefit from the Temporary Protected Status due to conditions in their countries which makes their return unsafe, or where the country cannot adequately receive its returning citizens.
A country may be qualified to receive a Temporary Protection due to an internal armed conflict, natural disaster or epidemic, or other extraordinary circumstances. People who qualify to receive Temporary Protected Status can apply for a work permit.