Name one potential hazard of improperly stored chemicals.

Improperly stored chemicals pose a significant risk because they can react with one another under certain conditions, leading to dangerous situations. When chemicals are not stored according to their compatibility, the potential for chemical reactions increases markedly. These reactions can result in fires due to the flammable nature of some substances, or even lead to the release of toxic gases that can harm individuals exposed to them. This is particularly critical in environments like commercial pools, where the handling and storage of various chemicals are routine and need to be managed with care to ensure safety for both workers and patrons.

While injury from heavy containers, mold growth, and pool water contamination are valid concerns, they do not capture the immediate and severe risks associated with chemical reactivity that can occur from improper storage.