Despite all our best foresight and planning for possible emergencies, sometimes we are all going to need a little help from our friends!  Check out this document as a great example of a Memorandum of Understanding (MOU) between HSLs for help in emergencies.  If you have experience establishing MOUs or actually using one that you had in place when disaster struck, please add a comment here, or send along an example (ssy2n@virginia.edu).