In the United States, the most recent decade (2000-2010) was the nation’s warmest on record. Record-breaking high temperatures are now outnumbering record lows by an average decadal ratio of 2:1. Record highs are occurring more often than record lows due to climate change.
In a stable climate, the ratio of new record highs to new record lows is approximately even. However in our warming climate, record highs have begun to outpace record lows, with the imbalance growing for the past three decades. This trend is one of the clearest signals of climate change that we experience directly.