As for the scoffers and the global warming deniers, JC had them pegged already, back in the first century:
As it was in the days of Noah, so will it be in the days of the Son of man. They ate, they drank, they married, they were given in marriage, until the day when Noah entered the ark, and the flood came and destroyed them all. Likewise as it was in the days of Lot -- they ate, they drank, they bought, they sold, they planted, they built, but on the day when Lot went out from Sodom fire and sulfur rained from heaven and destroyed them all -- so will it be on the day when the Son of man is revealed. ~ Luke 17: 26-30
Consider: fire, though it be low and slow, is fire just the same:
And there will be signs in sun and moon and stars, and upon the earth distress of nations in perplexity at the roaring of the sea and the waves, men fainting with fear and with foreboding of what is coming on the world; for the powers of the heavens will be shaken. ~ Luke 21: 25-26
Will you ignore the abundant signs?