Herbert signed the declaration Thursday requesting federal money to assist those in an area where a broken dike that sent a torrent of water through Santa Clara.
The dike disintegrated in heavy rains Sept. 11, sending a deluge of water from a retention pond into town.
The flood also damaged 16 businesses.
Santa Clara is about 270 miles south of Salt Lake City.
(Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.