It’s late September and Yosemite National Park’s most celebrated waterfall – Yosemite Falls – continues to put on a show with water plunging 2,425 from its top to the base of the lower falls. This is unusual. Yosemite Falls is as an ephemeral waterfall fed by snowmelt and usually expires for a couple weeks or months in late summer. Scott Gediman, a public information officer for Yosemite, has worked in the park for 20 years and he doesn’t remember the waterfalls ever flowing continuously through the summer into fall.