In New York City, there is a model organization in place to help houses of worship deal with and recovery from disasters.  It it the NY Disaster Interfaith Services. The organization developed many useful programs, documents, and tip sheets after Superstorm Sandy, which should be useful to those helping with response and recovery from Harvey and Irma.

One example is a  recent offer to help with Volunteer Group Housing in Housto> Here is a link to the NYDIS Volunteer Group Housing Program  which NYDIS developed to organize and support the voluntary rebuild efforts in NYC post-Sandy. Some documents   produced by the program include a Host Site Handbook, Volunteer Group Handbook, and a Guide to Writing a Host Site Manual

Each document includes applicable form sets which can be found separately on the link provided above. The program was designed with special concentration on religious and cultural needs of volunteers and host sites, and will provide organizations with the knowledge and resources necessary to begin and sustain long-term volunteer housing programs. These documents include formative advice based on sector best practices, extensive research, partnerships with NYC Sandy volunteer housing programs, and what was the NYC Volunteer Group Housing Task Force.

Another is this Community Emergency Management Toolkit.