Deficiencies in managing the tsunami threat to Hawaii last month are leading to planned improvements that include manual traffic intersection management, fewer broken warning sirens and safety information websites that don’t crash under high demand.

There also should be better public messaging from emergency management officials as to what the public should and should not do under a regular or extreme tsunami warning.

Planned improvements were shared Thursday with members of the state House Committee on Public Safety, who wanted to know what lessons were learned from state and county emergency management responses to the July 29 tsunami warning that led to widespread evacuations.

Evacuations from tsunami danger areas were deemed a success, but in some places resulted in three hours of t

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