Heavy rains drenched Oahu on Tuesday, spurring flooding and creating dangerous conditions on roadways from the urban core to Windward Oahu. The city Department of Emergency Management is partially activated, and volunteers are monitoring conditions islandwide. Manoa stream peaked at about 8 feet Monday night, double the usual height, but there were no reports of damage. A Flash Flood Warning that had been in effect for much of Tuesday was finally allowed to expire at 8:15 p.m. However, a Flash Flood Watch remains in effect for Oahu, Kauai and Molokai until 6 a.m. Wednesday. In the most intense storms Tuesday, rain was falling at a rate of 3 to 4 inches an hour. As of Tuesday evening, Honolulu got 2.56 inches of rain, beating a record of 2.09 inches in 1992. The heavy rains snarled traffic in several spots, and caused a number of accidents. Several were reported to be serious. About 9 p.m., a downed tree closed Kailua-bound lanes of the Pali Highway. Earlier in the evening, police closed Tantalus Drive after a tree fell on the road. It wasn't clear how long it would take to clear the trees. The downpours also forced forced the city to close the Honolulu Zoo about 2 p.m. And city officials closed the City Lights display at Honolulu Hale on Tuesday night due to the severe weather. Meanwhile, firefighters responded to several calls of hikers in distress on Oahu trails. Five hikers were rescued from the Maunawili Trail after getting stuck by rising waters. There were no injuries reported, but fire officials used the rescue to urge hikers to stay off trails in wet weather.