Even the worlds greatest climber cant scale a skyscraper slick with rain especially without ropes or a safety net.

World-renowned rock climber and Free Solo star Alex Honnold was slated to attempt a daring ascent of Taipei 101, one of Asias tallest buildings at 9 a.m. local time in Taipei on Saturday, or 8 p.m. ET, on Friday in an event broadcast globally asSkyscraper Live, Netflixs latest foray into live sports programming.

But as the sun rose on Taipei Saturday morning and revealed a cityscape drenched by a steady drizzle, it was clear the spectacle was in jeopardy. About 30 minutes before Honnold was originally scheduled to begin piecing his way up the base of the tower, Netflix revealed that the climb would be delayed by exactly one full day, in the hopes of clearer local weather on Sunday. The streamer said the decision whether to postpone was entirely Honnolds to make, since it was his life literally on the line.

Ultimately, this will be Alexs decision, a representative for Netflix had told The Hollywood Reporter on Friday. How is he doing and how is he feeling about the conditions?

It soon became obvious in Taipei on Saturday morning that Honnold was feeling his feat simply couldnt be done when his 1,667-foot target was slick with rain and whipped by gusts of wind.

Were confident were gonna have a great show here we just need the weather to be kind, said Grant Mansfield, CEO of Plimsoll Productions, one of the companies behind Skyscraper Live. That building is very climbable when its dry, but when its wet, it just becomes so slippery. Alex couldnt possibly climb it wet even with ropes.

Due to weather, we are unable to proceed with todays SkyscraperLIVE event, Netflixs official statement read. It has been rescheduled forSaturday, January 24 at 8 p.m. ET|5 p.m. PT. Safety remains our top priority, and we appreciate your understanding.

The postponement underscores the real-life risk of Honnolds planned attempt.

Netflix says it is confident in Honnolds ability to return to ground safely, but it has taken the uncommon step of planning a 10-second delay of its live stream of the climb to give parents confidence that their kids wont potentially witness a real-life tragedy.

We dont have any concerns about profanity at all, but we want to make sure that were responsible for our audience, explained Jonathan Mussman, Netflixs vice president of production for nonfiction and live programming. Just in case, God forbid, right?

Climbing experts, and Honnold himself, have said Taipei 101s geometric structure makes for a relatively straightforward challenge compared to the technical complexity of many of his most awe-inspiring climbing feats, especially Yosemites El Capitan, which was famously documented in the Oscar-winning Free Solo. But the building is nonetheless staggeringly tall, making the ascent something like a vertical marathon.

One of the big differences between climbing a building and rock climbing is that there really isnt a hardest single move, Honnold said in a promotional piece released by Netflix. In some ways, its less intimidating than the big free solos [on rocks] that Ive done. The challenge comes from the overall physicality of it. The fatigue that [sets in] over the course of the building is slightly harder to anticipate. I dont know how its gonna feel.

Buildings are steeper than rock faces, he added. Most rock faces arent actually vertical. Or, theyre not vertical the whole way, [like] the building is.

Honnold has been spotted practicing on Taipei 101 this week with ropes occasionally by office workers peering out their windows in awe at the real-life Spider-Man gliding past their desks.

Before Netflixs rescheduling was revealed, disappointment was palpable in Taipei, where local news coverage had been building excitement around the spectacle on the citys most famous landmark for weeks. On Friday night, Taipei 101s face was lit up with neon lights reading: Go Alex!

Spectators were expected to gather by the thousands at the base of the tower to witness the spectacle, but the streets were deserted early Saturday amid the ugly weather, with Honnolds many local fans clearly banking on a rain-out.