Minnesota Historical Society: Salvage Procedures for wet items. Good overview where different artifacts are linked to PDF-files with emergency procedures. Looks fairly complete. http://www.mnhs.org/preserve/conservation/emergency.php
Nebraska Historical Society: Disaster Preparation Response and Recovery of Treasures. Unfortunately many links weren't working on the page. So you just get a list of Contents. http://www.nebraskahistory.org/disaster.shtml One link working was to a PDF-file: "Are you prepared? A guide to emergency planning" by Julie A. Reilly, The Gerald R. Ford Conservation Center, The Nebraska State Historical Society, 1997
FEMA: After the Flood: Advice for Salvaging Damaged Family Treasures. Little PDF-file with lots of links and Information. https://www.fema.gov/media-library-data/1452008937293-2c5cf070cabce562b9...
Pocket Response Plan™ PReP ™ Templates. This is a concise document for recording essential Information needed by staff in case of a disaster or other emergency. https://www.statearchivists.org/programs/emergency-preparedness/emergenc.... As well in spanish and portuguese.
There is also a site: The Online Disaster-Planning Tool for Cultural and Civic Institutions. There you can login first with a demo account. http://dplan.org/
On Artsready you can find lots of useful links concerning disaster planning including most of the ones listed here. https://www.artsready.org/page/useful_links?ct=t(APAP_Webinar_Promo8_16_2016)&mc_cid=fb65874015&mc_eid=318f4891c1
There you can find a link to a "Risk Assessment": http://www.agilityrecovery.com/assets/SBA/riskassmtsba.pdf
I also find the "Emergency Preparedness. Mississippi Arts Commission. 2011" fairly useful (http://www.arts.ms.gov/resources/documents/EmergencyPreparednessPlan2011...)
The MoMA also has some interesting Information prepared. First there is an "Immediate Response for Collections" (https://www.moma.org/momaorg/shared/pdfs/docs/explore/conservation/emerg...), than a list with "Disaster Recovery: Supplies for Salvage", i.e. anything you might need. You can also follow a link to an presentation on "Consortium on recovery of works of art damaged by flooding", by AIC.