The US National Hurricane Center continued to warn of 'life-threatening flash flooding'.
To capture the White House, a candidate must amass at least 270 votes in the Electoral College.
Democrat challenger would be over the magic threshold of 270 electoral votes if he prevails.
Votes are still being counted in all three states, among a handful of battleground states that could decide the presidency.
Demonstrators rallied in cities including Philadelphia, Washington, Phoenix and Detroit, for the second day in a row on Thursday.
The 193 UN member nations have adopted four resolutions on the pandemic so far this year.
Supporters of Trump and Biden clash over disagreements over the polling process in certain states.
Trump campaign says more legal action coming.
Trump's campaign has called for a recount in some states, filed lawsuits.
Biden's victories in the Great Lakes states mean he is one battleground state away — any would do — from becoming president-elect.