Visiting the Grand Canyon can be particularly dangerous in the summer because of the risk of flash flooding. Sunny days can turn to downpours within minutes.
This article was originally published by 9News Colorado (RSS) on Monday, August 31, 2026. TownPost surfaces local news from over 40 outlets and uses AI to score each story for relevance to Longmont and the surrounding area.
Relevance score: 10/100. This story has regional context that may affect Longmont.
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