LeMars Sentinel, Thursday, June 27, 1895, Page 3, Column 4:

Storms Caves for the Schools.

The recent Sioux County cyclone has been the means of arousing the people in
the county school districts to the necessity of providing storm protection
for the pupils and teachers of the outlying schools. In many places the
school directors are having cyclone caves dug and the patrons of the schools
have less fear for the safety of their children during the cyclone period
when such protection is provided. Union township, in this county, is taking
the lead in the matter and now every school in the township is provided with
a cave.