Hurricane Douglas swept north of Hawaii, sparing Honolulu but still posing a threat to Kauai on the northwestern end of the Pacific island chain.
The storm was expected to skirt north of Kauai as it barrels past the Hawaiian islands, packing 150km/h winds, the National Hurricane Center said.
Hurricane warnings for Oahu were cancelled but remained in effect for Kauai and Niihau islands.
"Hurricane Douglas (is) a little stronger as it pulls away from Oahu and skirts north of Kauai," the NHC said.
It is rare for severe storms to make landfall in Hawaii, which has been hit by hurricanes just twice in its modern history - Dot in 1959 and Iniki in 1992.
Maui county lifted its hurricane warning after skies began clearing over the island by mid-afternoon and mayor Mike Victorino said there were no reports of serious damage.
Evacuation centres had been opened in Honolulu, a city of 350,000, with space for up to 1,600 people, but fears of coronavirus spread made them "a last resort," the city's mayor Kurt Caldwell said.
"If you are sheltering away from home today, please remember that #COVID19 is not taking a break for the storm," Mr Caldwell tweeted yesterday.
Large swells generated by Douglas were expected to affect the islands, raising the risk of damage from high surf to shoreline property.
Hurricane conditions were expected across northern Kauai, including up to seven to 15cm of rain, which posed a threat of flash floods and landslides.
Roads flooded in Texas in aftermath of Hurricane Hanna
Late last night, Hurricane Hanna was downgraded to a tropical depression after lashing Texas.
It was still packing winds of around 45km/h as of 10pm local time, after crossing from the Lone Star state into Mexico, the National Hurricane Center said, adding the storm should dissipate by today.
There were no immediate reports of casualties or widespread damage, and both Mexico and Texas had lifted all coastal storm warnings by yesterday afternoon.
Damage appeared limited in the immediate aftermath of Hanna's Saturday arrival on Padre Island, a 177km-long barrier island off the Texas coast.
Tropical Depression #Hanna Advisory 17: Tropical Depression Hanna Over Northeastern Mexico. Heavy Rain and Dangerous Flash Flooding Continue Over Far Southeast Texas and Northeast Mexico. https://t.co/VqHn0u1vgc— National Hurricane Center (@NHC_Atlantic) July 27, 2020
Images captured by CBS showed roads and a caravan park in the Texas coastal city of Corpus Christi strewn with debris and downed trees.
Some motorists even braved flooded roads, while one hardy storm-watcher was seen calmly taking pictures of the beach from a wind-swept promenade.
Local authorities were readying for the possibility of tornadoes into the evening in southern Texas, as the American Red Cross opened three shelters across the state in preparation.
Images shared by the National Weather Service office in Corpus Christi showed water lapping at the city's bayfront Art Museum of South Texas.