What with all the power lines, electric fences, foliage, dinosaurs, and even lightening, it seems to be fire would be an exciting/real threat. Imagine a fire spreading through a paddock's jungle or terrified dinosaurs on fire running throughout your park, spreading the flames. It would make the electricity especially powerful and also make it so you have to respond to electric-related crises quickly. You'd have to include fire suppression systems or fire trucks, various emergency vehicles, to cover that eventuality -- adding another layer to manage.