This year’s United Nations climate summit, scheduled for November in Brazil, has been designed to make history by bringing world leaders, diplomats and some 50,000 other participants into the heart of the Amazon rain forest. Now the event increasingly risks being defined by a looming logistical fiasco.

With fewer than 100 days to go, Brazil is under fire from countries concerned about a shortage of hotel rooms and soaring accommodation costs in Belém, the host city selected for its proximity to the rain forest rather than its tourism infrastructure. Brazil’s secretariat for COP30, as the summit is known, postponed a meeting set for Wednesday to address lodging issues; no new date announced.

In a 19-page letter reviewed by Bloomberg News from Brazil to several U.N. member countries participating in COP30, organizers rejected the idea of relocating the summit. "There will be no alternate location, as COP30 will not be moved from Belém,” the letter stated, because the host city "already has a sufficient number of beds to accommodate all expected participants.”