(CNN) Hawaii residents breathed a sigh of relief Saturday after Hurricane Lane disintegrated into a tropical storm, but authorities warned that its thrashing winds and relentless rain would remain a threat into the weekend.

Lane dumped more than 40 inches of rain in some parts of the Big Island over several days, sending residents fleeing life-threatening flash flooding and landslides.

Lane's threat came as Maui residents also battled two brush fires , including one that caused evacuations in a resort area.

It weakened to a tropical storm Friday, a major downgrade for what was a Category 3 hurricane just a day earlier.

Further weakening was forecast through the weekend, with Lane expected to become "a remnant low" by late Saturday or Sunday, the Central Pacific Hurricane Center said.

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