Mastodon bots which mirror the NWS warnings back them up
What failed was local officials not succeeding in alerting people — in large part because they had plan or mechanism available to do so with the roughly one-hour warning that current meteorology can provide for specific flash floods like this.
Archived copies of the article:
And if you read the whole article, the same meteorologists state that the funding cuts are also a big reason for things like this happening, so the headline is disingenuous.