Do they exist in the phase space for the dynamical system that governs the earth's climate? Yes. Are they just around the corner? No one knows.
Actually their existence and the possibility that whatever actually has driven recent changes in climate -- almost certainly a combination of natural climate cycles, greenhouse gas emissions, and other the universally ignored human influences, aggregate urban heat-island effect and deposition of soot on ice packs, both polar and alpine -- we have already passed one is an argument for throwing massive amounts of effort and money at adaptation, rather than seeking to suppress the presumed cause in CO2 and CH4 emissions. Things like ag research on growing crops in hotter drier, hotter wetter, colder drier and colder wetter climates than we now use for growing most food, water projects to move water for irrigation and other human use from areas getting too much rainfall to those experiencing drought, encouraging improved insulation in building construction (which is adaptive, long-term economical, as well as addressing what the alarmists favor as the explanation),... should be getting the money being tossed at "green energy" (a complete boondogle even if on believes in "decarbonizing" the energy economy -- the only serious way to do that is nuclear power.)
