Although things should dry out today, more heavy rainfall is forecast for tomorrow through Thursday.
"A strong cold front is approaching from the northwest and will reach the smaller islands (west of the Big Island) as early as Wednesday morning," forecaster Ian Morrison said.
The state will be under a flash flood watch from 6 a.m. tomorrow until 6 p.m. Thursday. Winds up to 45 mph are forecast for higher elevations on Kauai and Oahu, which could bring strong gusts accelerating downslope.
Heavy rain on Maui last night is believed to have triggered a rockslide that closed Honoapiilani Highway, cutting off Lahaina and the West Maui resort areas from the rest of the island for an hour.
The rockslide was reported at about 6:30 p.m. in the pali area of Honoapiilani Highway, county spokesman Rod Antone said.
Both lanes of the highway were closed between Maalaea and Ukumehame, Antone said. The highway was reopened at 7:30 p.m.
Antone said the rockslide appeared related to the heavy rain.
Cool temperatures will continue. On Sunday a low of 57 degrees at Lihue Airport tied the record low for that location set in 1968.