In The Devil in the White City, what were some of the architectural obstacles overcome in builing of the Chicago World's Fair?

The Devil in the White City recounts
the saga of creating the World's Fair in Chicago in the late 1800s. There were many
obstacles to overcome in the creation of the Chicago World's Fair, many of them specific
to the architecture but others, as well. One huge obstacle was the weather. The Midwest
in winter is a devilish hazard just to live in; for someone trying to build something as
monumental as these structures, it would have been horrific. A second obstacle was the
Fair's proximity to water. Not only did that make the weather conditions worse, it also
created an unstable foundation for any structure. Third, the great architects in America
(located primarily on the east coast) at first refused to work on the project, insulted
because New York was not chosen as the site for this World's Fair and appalled that such
a "heathen" city would be hosting the world and representing the best of America. Once
they did finally join the project, there was the natural discord of creative people with
disparate visions. This caused countless delays, compromises, and problems during the
course of building the Fair.

There are certainly others, as
you no doubt know from your reading, but these are the primary three obstacles to the
architectural work at this World's Fair in Chicago.