Residents of Oahu were still contending Monday with the damage wrought by a punishing storm that caused the most extreme flooding that Hawaii has seen in two decades.

The storm, which was at its most powerful between last Thursday and Saturday forced thousands of people to evacuate their homes, swept buildings off of their foundations and came treacherously close to overwhelming reservoirs.

In many areas, including the northern reaches of Oahu, about an hour north of Honolulu, there was just no place for the rainwater to go, so it pooled, across stream banks, roads, neighborhoods and farmland.

Conditions were expected to improve Monday, with forecasters at the National Weather Service predicting some heavy rain and possible thunderstorms for the Big Island, prompting officials to leave an existing flood watch in place for the Big Island through Monday afternoon.

Slightly strengthening trade winds were also expected to bring cooler, drier air, which was expected to help stabilize weather conditions, according to the weather service. In the coming days, the rain showers that do develop would be considered routine, the weather service said.

The state is eyeing more than $1 billion in needed disaster relief and questions about whether the Trump administration will provide it.

Here is more video from across Oahu in past days:

This article originally published at Videos show what Oahu looks like after days of flooding and historic storms.