It planned to sound civil defense sirens across the island state at 6 a.m. local time (11 a.m. EST) after the Pacific Tsunami Warning Center said a tsunami was generated that could cause damage along the coasts of all the Hawaiian islands.
Buses will patrol beaches and take people to parks in a voluntary process expected to last five hours.More than an hour before sirens were due to sound lines of cars snaked for blocks from gas stations in Honolulu.
"Urgent action should be taken to protect lives and property," the Warning Center said in a bulletin. "All shores are at risk no matter which direction they face."
Geophysicist Victor Sardina said the Hawaii-based center was urging all countries included in the warning to take the threat very seriously.
"Everybody is under a warning because the wave, we know, is on its way. Everybody is at risk now," he said in a telephone interview.The warning follows a huge earthquake in Chile that killed at least 82 people and triggered tsunamis up and down the coast of the earthquake-prone country.
The center estimates the first tsunami, which is a series of several waves in succession, will hit Hawaii at 11:19 a.m. Hawaii time (4:19 p.m. EST) in the town of Hilo on the Big Island of Hawaii, with waves in Honolulu at 11:52 a.m.
Sardina said the Hawaiian islands could expect waves of six feet (two meters) in some places. Other estimates have been higher but he could not confirm those were likely.
Sardina said the center was looking at Hilo Bay on Hawaii Island as a worst-case scenario right now.