From EO 12656 that revoked EO 11490 the revoked EO 10998 (http://www.archives.gov/federal-register/codification/executive-order/12656.html):
Sec. 203. Resource Management. The head of each Federal department and agency, as appropriate within assigned areas of responsibility, shall:
(1) Develop plans and programs to mobilize personnel (including reservist programs), equipment, facilities, and other resources;
(2) Assess essential emergency requirements and plan for the possible use of alternative resources to meet essential demands during and following national security emergencies;
(3) Prepare plans and procedures to share between and among the responsible agencies resources such as energy, equipment, food, land, materials, minerals, services, supplies, transportation, water, and workforce needed to carry out assigned responsibilities and other essential functions, and cooperate with other agencies in developing programs to ensure availability of such resources in a national security emergency;
Now THAT's what we call broad. I chased down the amendments to this EO and from what I can tell, it remains on the books unamended as specifically regards Federal power to confiscate food and water resources and control their distribution.