There are many resources to help congregations become safer. Sanctuary Congregations should think through any trainings with governmental departments that currently work with ICE, particularly if the resource requires signing up for membership, such as an online workshop or DHS staff learning building-related information about Sanctuary congregations.
Church Mutual has made most of its resources open to the public so you do not have to be insured by them to reach these resources on their website:
FEMA's Guide for Developing High-Quality Emergency Operations Plans for Houses of Worship (PDF) helps congregations plan for the spectrum of threats and hazards they may face.
Assist your members in preparing at home with Red Cross: Prepare for Emergencies
Hurricane Preparedness tips from the US Department of Homeland Security.
Webinar: Before Disaster Strikes from the UUA's MidAmerica Region.