Tropical Storm Iselle, a former Category 4 hurricane,struck Hawaii’s Big Island and Maui early Friday, bringing heavy rains, strong winds, downed trees and power outages.

Iselle virtually shut down the state for a day as residents and hotel operators heeded warnings and prepared for the worst.

There were several road and highway closures and reports of damage to homes and buildings from fallen trees and strong winds, according to the Hawaii County Civil Defense Agency. There are also numerous reports of downed power lines across the island. Hawaii Electric Light has asked residents to save power as much as possible until further notice.

Rain and strong winds were expected in Oahu until the early evening. Oahu is now under a flood advisory after local officials gauged rainfall at 2 inches per hour on the island.

The residents have been cautioned in the event of damaging flash floods and road closures. Residents and tourists were ordered to stay out of the flood and storm water runoff because of the possibility of overflowing cesspools, pollution and other pathogens.

Residents are being allowed to return home in all areas on the Big Island except Ka’u and Hamakua, where storm conditions are continuing.

Shelters will remain open in Laupahoehoe, Honka’a, Ka’u and Pahoa. More than 1,200 people had gone to shelters overnight Thursday.

Nearly all flights in and out of the island had been canceled. Public schools, universities, beach parks and national parks in the entire state were closed until the storm passed. All state offices are closed and will reopen Monday.

Bruce Kim, executive director for the state Office of Consumer Protection, announced a price freeze on all commodities and said any reports of price gouging would be investigated and, if substantiated, would be prosecuted to the fullest extent.

Hawaii Tourism Authority President Mike McCarthy said that hotels are prepared to implement their emergency plans and guests are advised to remain at their accommodations.

Hurricane Julio, which has been traveling close behind Iselle, has been downgraded to a Category 2 hurricane, sustaining maximum winds of 105 mph. Julio is expected to veer north of the Big Island, bringing rain and strong winds to the island, according to the National Weather Service.