A weak front bringing more showers is expected to arrive today on Kauai and spread to the remainder of the state through tonight or by Thursday, the National Weather Service forecasts.
But the muggy weather will be replaced by cooler conditions brought by a cooler, drier air mass behind the front.
Showers will be confined to windward and mauka areas, the National Weather Service said.
And Tropical Storm Nora, with winds of 50 mph, could bring wet weather in the latter part of the week.
Nora, about 675 miles southeast of Hilo at 4 p.m. Monday, was predicted to head northeast but is now forecast to turn southwest.
“Moisture from this guy might eventually spread to us Friday and Saturday,” said National Weather Service meteorologist Norman Hui.
On Monday, heavy rainfall caused flash flooding along portions of Windward Oahu.
The Waikane Stream overflowed onto Kamehameha Highway at 9:25 a.m. The water on the roadway was 8 inches deep, the city Department of Emergency Management said.
Police closed the highway for three hours.
The 12-hour Waiahole rainfall gauge at 5 p.m. showed a total of 5.46 inches, and Kahana got 5.42 inches during the same period.
The Polynesian Cultural Center in Laie announced Monday it was closing because of the weather. However, the Hukilau Marketplace shops and restaurants remained open.
On Maui, heavy rains Sunday caused a flash flood on Iao Stream in Wailuku that stranded three groups of people swimming in the stream.
The Maui Fire Department reported an 11-year-old boy and 12-year-old girl, both from Wailuku, were swept downstream at Kepaniwai Park in Iao Valley at about 1:30 p.m. Sunday.
Bystanders grabbed them out of the water and paramedics treated them for minor scrapes and bumps.
Just before 2 p.m., Kahului firefighters tied a rope across the stream to rescue an 18-year-old Haiku man who had been stranded on the other side of Iao Stream in Kepaniwai Park by flash flooding.
