The USCIS has issued a Fact Sheet explaining Humanitarian Parole, how to apply, fees, supporting evidence required, etc.
Humanitarian parole allows a person to enter the US temporarily due to urgent humanitarian reasons. Parole cannot be used to avoid regular visa-issuing procedures or to bypass immigration procedures. An applicant for parole will need to show why she was not able to get a visa to enter the US. Parole does not confer any permanent immigration status, but does enable a recipient to apply for work authorization.
Humanitarian parole is typically granted for the duration of the emergency or compelling situation at issue. The parolee can request an extension of the parole period, however.
Humanitarian parole is applied for using a Form I-131 (available here). For more information about Humanitarian Parole, please contact my office.