This is the problem with things like climate change and ecological collapse. Science is extremely slow to measure and understand the phenomena. But the disasters can move far faster than the science, wrecking havoc as they go. Scientists are naturally cautious and skeptical and so will dismiss the kind of claims it takes to move people until those claims are overwhelmingly supported.
By the time scientists have enough data to comfortably support the claims, it's far too late to act on them.