UPDATE: Tuesday, 4:45 a.m.

The National Weather Service has extended the flash flood warning for Kauai until 5:45 a.m.

Rain was falling at rates of up to 2 inches per hour and Kuhio Highway near the Hanalei Bridge was closed due to flooding, forecasters said..

The flood watch for Oahu, Kauai and Niihau remains in effect through this afternoon.

“Deepening low pressure west of the state will produce an increase in heavy showers and thunderstorms over the western end of the state through this afternoon,” the advisory says. “Given that soils are already saturated and streams elevated, flash flooding may develop anywhere, especially over the island of Kauai.”

11:55 p.m.

The flash flood warning for Kauai has been extended to 2:45 a.m. Tuesday.

“At 11:26 p.m., Emergency Management reports that Kuhio Highway near the Hanalei Bridge is now closed due to flooding,” the National Weather Service said. “The Hanalei River and Hanalei River Bridge stream gauges remain elevated, as well as other streams across the island. This trend will continue overnight as additional heavy showers with rates of 1 to 2 inches per hour moves in from the southeast.”

The flood advisory for Oahu, meanwhile, has been extended to 2:30 a.m. Tuesday.

“At 10:59 p.m., radar continues to show a band of showers developing over the western half of Oahu,” the advisory said. “This shower band will continue to produce periods of moderate to heavy rain from the Waianae Mountains to the Ewa Plain. Other areas on the eastern half of Oahu may also see periods of heavy rainfall trends over the next few hours. Rain was falling at a rate of 1 to 2 inches per hour.”

The advisory covers Honolulu, Mililani, Pearl City, Waikele, Wahiawa, Wheeler Field, Waipahu, Kunia, Aiea, Halawa, Schofield Barracks, Waiahole, Waikane, Salt Lake, Moanalua, Kahaluu, Ahuimanu, Iroquois Point, Ewa Beach and Kaaawa, according to the weather service.

A separate flood advisory is also in effect for parts of Hawaii island until 1:45 a.m. Tuesday.

“At 10:34 p.m., radar indicated heavy rain over portions of Puna and Kau Districts. Heaviest rain was falling in a band from near Pahoa to the Kawa Flats. Rain was falling at a rate of 1 to 2 inches per hour,” according to the advisory.

The advisory covers Hawaiian Paradise Park, Hawaii Volcanoes National Park, Wood Valley, Pahala, Volcano, Punaluu Beach, Glenwood, Kawa Flats, Mountain View, Naalehu, Hawaiian Acres, Orchidland Estates, Keaau, Pahoa, Hawaiian Ocean View, Fern Forest, Eden Roc, Fern Acres and Waiohinu.

About 7 p.m. near Honomu on the Big Island, Highway 19 was closed near mile marker 13 due to a landslide.

9:45 p.m.

The National Weather Service in Honolulu has issued a flash flood warning for Kauai until 11:45 p.m“At 9:13 p.m., radar showed persistent bands of heavy rainfall moving over Kauai from the southeast with rates of 1 to 2 inches per hour,” the warning says. “Water levels have begun to rise in the streams across much of the island, especially in the South Fork Wailua and Hanalei rivers. Runoff impacting vulnerable low lying areas and roads is likely through the late-evening hours.”

The weather service warns of possible landslides, road closures, and flooding in drainages, streams, rivers, roads, and low-lying areas across the island.

The Hawaii Emergency Management Agency warns Kauai residents and visitors to “avoid all unnecessary travel. Roads may close with little or no notice, including Kuhio Highway at Hanalei.

8:20 p.m.

The flood advisory for Oahu has been extended until 11:30 p.m., while the advisory for Kauai is in effect until 10:30 p.m., according to the National Weather Service.

“At 8:01 p.m., radar shows a band of showers over the western half of Oahu this evening. This shower band will continue to produce periods of moderate to heavy rain from the Waianae Mountains to the Ewa Plain, the Oahu advisory says. “Other areas on the eastern half of Oahu may also see increasing heavy rainfall trends over the next few hours. Rain was falling at a rate of 1 to 2 inches per hour.”

Areas covered by the flood advisory include Honolulu, Mililani, Pearl City, Waikele, Wahiawa, Wheeler Field, Waipahu, Kunia, Aiea, Halawa, Schofield Barracks, Waiahole, Waikane, Salt Lake, Moanalua, Kahaluu, Ahuimanu, Iroquois Point, Ewa Beach and Kaaawa.

The Kauai flood advisory covers the entire island, forecasters said. “At 7:12 p.m., radar showed bands of moderate to heavy rainfall moving over Kauai from the southeast with rates of 1

to 2 inches per hour,” forecasters said. “Water levels have begun to rise in the streams across much of the island, which could lead to runoff impacting vulnerable low lying areas and roads through the late evening hours.”

The American Red Cross, meanwhile, said it has opened two emergency shelters on the Big Island due to flooding. The shelters are at the Naalehu Gym on 95-5635 Mamalahoa Highway in Naalehu, and at the Kau District Gym, 96-1219 Kamani St. in Pahala.

6:20 p.m.

The flood advisory for Oahu has been extended to 8:30 p.m., forecasters said.

“At 5:17 p.m., radar indicated scattered heavy showers continuing to develop across central, southern, and western Oahu, with rain rates of 1 to 1.5 inches per hour,” the National Weather Service advisory said. “Additional heavy showers are forming just south of Oahu and will likely affect the island this evening. Grounds are saturated from recent rainfall, and water will quickly run off.”

The advisory covers the entire island of Oahu.

A flood advisory for Kauai remains in effect until 7:30 p.m., while Oahu, Niihau and Kauai are under a flood watch through Tuesday afternoon.

4:35 p.m.

The National Weather Service in Honolulu has placed the island of Kauai under a flood advisory through 7:30 p.m., while Oahu’s flood advisory is in effect until 5:30 p.m.

Niihau, Kauai and Oahu also remain under a flood watch through Tuesday afternoon.

“Deepening low pressure west of the state will produce an increase in heavy showers and thunderstorms over the western end of the state through tonight. Given that soils are nearly saturated, flash flooding may develop anywhere on Oahu,” the flood watch says.

Kauai, meanwhile, was seeing heavy rain over the south shore at around 4:30 p.m. with rates of 1 to 2 inches per hour, according to the advisory. “The heavy rain will continue to spread across the entire island through the remainder of the afternoon.”

All flood advisories and watches for Hawaii Island have been lifted.

3:41 p.m.

A flood watch for Oahu, Kauai and Niihau is in effect until Tuesday afternoon due to the possibility of excessive rainfall. A flood watch means conditions are favorable for flash flooding.

Affected Oahu areas include Waianae mountains and coast, North Shore, Olomana, Central Oahu, East Honolulu, metro Honolulu, Ewa Plain, Windward and Leeward Koolau. North, east, south, southwest Kauai and Niihau are also affected.

The National Weather Service in Honolulu said deepening low-pressure west of the state will produce more heavy showers and thunderstorms over the western side of the state through tonight. “Given that soils are nearly saturated, flash flooding may develop anywhere on Oahu,” according to the statement.

Oahu is also under a flood advisory until 5:30 p.m.

According to the National Weather Service, the radar at 3:21 p.m. indicated scattered heavy showers across central and southern Oahu with more rainfall moving into the windward areas. Forecasters reported rain falling at a rate of 1 to 1.5 inches per hour.

Some locations expected to experience flooding include Honolulu, Mililani, Pearl City, Waikele, Wahiawa, Wheeler Field, Waipahu, Kunia, Aiea, Halawa, Waiahole, Schofield Barracks, Waikane, Salt Lake, Kahaluu, Moanalua, Ahuimanu, Iroquois Point, Ewa Beach and Kaaawa.

Meanwhile, Hawaii island is still under a flood advisory, according to Hawaii County Civil Defense Agency.

In a statement, Hawaii County Civil Defense Agency said a flood advisory continues for Hawaii island with heavy showers in Hilo, Puna and Kau areas, while thundershowers were reported in the Kohala and Kona areas.

Flooding has prompted the closure of Highway 11 between mile markers 59 and 60 in Kawa Flats, Wood Valley Road and Kaalaiki-Cane Haul Road in Kau.

1:25 p.m.

A flood advisory has been posted for Hawaii island through 3:45 p.m. today.

At 12:33 p.m., radar and automated gauges showed persistent moderate rain falling at rates up to 1 inch per hour along the sloped of the Hilo, Puna and Kau districts, the NWS said.

Also, spotty, heavy showers and thunderstorms have developed across the leeward side of Hawaii island with localized rainfall up to 2 inches per hour.

12:30 p.m.

A flood advisory is in effect for Oahu through 3:30 p.m. today.

At 12:20 p.m., radar showed areas of heavy rain — mainly over West Oahu near Kaena Point — falling at a rate of 1 to 1.5 inches per hour, the National Weather Service said.

Some locations that will experience flooding include Honolulu, Mililani, Pearl City, Waipahu, Waiahole, Kahaluu, Moanalua, Ahuimanu, Ewa Beach, Kaneohe, Maunawili, Kaaawa and Makua Valley.

PREVIOUS COVERAGE

A flood watch is in effect for Kauai County through Tuesday afternoon.

A deepening area of low pressure west of Hawaii will spawn an increase in heavy showers and thunderstorms over West Kauai this afternoon and tonight, according to the National Weather Service. Flash flooding may occur anywhere on Kauai and Niihau due to soils that are nearly saturated.

Flood-prone roads and low-lying areas may be closed due to elevated runoff and overflowing streams, weather officials said. However, urban areas may receive more flooding and property damage because of rapid runoff.

At the other end of the main Hawaiian islands, a winter weather advisory is in effect for the summits of Hawaii island through 6 p.m. Tuesday.

“Icy roads will create hazardous driving conditions,” the NWS said in a bulletin today.

A winter weather advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Motorists should be prepared for slippery roads and use caution while driving.