e.g. in 2007:
Their latest modelling studies indicate northern polar waters could be ice-free in summers within just 5-6 years. Professor Wieslaw Maslowski told an American Geophysical Union meeting that previous projections had underestimated the processes now driving ice loss.
Note that things like tobacco cancer warnings use use can/could not will/would, and the intent of the message is still clear.
"SURGEON GENERAL WARNING: Cigar Smoking Can Cause Lung Cancer And Heart Disease."
"WARNING: This product can cause mouth cancer."