USCIS Offers Measures Available to Those Affected by Hurricane Harvey
To help individuals affected by Hurricane Harvey in Texas, U.S. Citizenship and Immigration Services (USCIS) now offers the following immigration services (upon request on a case-by-case basis):

Changing a nonimmigrant status or extending a nonimmigrant stay for an individual currently in the United States. Failure to apply for the extension or change before expiration of the authorized period of admission may be excused if the delay was due to extraordinary circumstances beyond individual’s control;
Re-parole of individuals previously granted parole by USCIS;
Expedited processing of advance parole requests;
Expedited adjudication of requests for off-campus employment authorization for F-1 students experiencing severe economic hardship;
Expedited adjudication of employment authorization applications, where appropriate;
Consideration of fee waivers due to an inability to pay;
Assistance for those who received a Request for Evidence or a Notice of Intent to Deny but were unable to submit evidence or otherwise respond in a timely manner;
Assistance to those who were unable to appear for a scheduled interview with USCIS;
Expedited replacement of lost or damaged immigration or travel documents issued by USCIS, such as a Permanent Resident Card (Green Card); and
Rescheduling a biometrics appointment.
Source: USCIS.