A major bridge over the Chicago River remains stuck in the raised position for more than four hours after it lifts to allow a boat to pass. The issue begins Wednesday when the bridge moves upward for river traffic and then fails to return to its normal position.

The outlets attribute the problem to dangerous heat. They report that high temperatures cause the bridge’s components to expand, preventing it from lowering properly once the boat has cleared. As a result, downtown traffic is disrupted while the bridge stays open.

While the sources differ mainly in wording, they consistently describe the same sequence: the bridge lifts for a boat, it gets stuck, and the raised position persists for several hours. Each account links the malfunction to heat-related expansion rather than mechanical failure unrelated to temperature. Officials and transport crews are not described in detail in the provided excerpts, but the shared focus is the duration of the stuck period and its impact on traffic flow.