Emergency managers directed Oʻahu residents in "red zones" to head inland on Tuesday as the state faced a tsunami. But Oʻahu's evacuation maps also show yellow "Extreme Tsunami" zones. Did people in those areas need to evacuate as well?

When a Tsunami Advisory is issued, there will be no coastal evacuations; however officials will evacuate the ocean and beaches. Stay out of the ocean and away from beaches, and stay out of any canals or streams that feed directly from the ocean.

While Monday's tsunami response was ultimately more of a drill than a true emergency, the traffic it triggered offered a real-time test of Oahu’s evacuation capacity — one that state officials admit was deeply strained.