Even if every single news site went down on election night, it would be fine. People aren't gonna die if they don't find out who won the election until the next day or even the next week.
The results of this election will not be knowable the night of the election anyway. There are way too many people currently preparing too many different ways to challenge the results regardless of what actually happens.
Finding out the winner on election night is really just a modern illusion. Media "calls" have zero legal weight, and they rely on predictable geographical voting patterns and large enough win margins to build confidence on the outcome before all the unofficial tallies are in. That's way more difficult these days.
The fastest state to certify actual official results takes 2 or 3 days (Delaware), and most states are closer to 2 or 3 weeks.
Harris doesn't need to "attempt it", she somehow became the Democratic choice without a single vote for her, replacing the man who said it'd be ridiculous after all the millions of votes he got