About: The Climate Shift Index is produced by Climate Central, and reveals how much climate change influences the temperature on a given day. The index ranges from -5 to +5, with positive numbers indicating temperatures becoming more likely due to climate change, and negative numbers indicating conditions becoming less likely. The index is a multiple of how frequently a particular temperature will occur due to climate change. (For example, a level 5 shift means that a temperature is happening 5 times more frequently compared to a world without human-caused carbon pollution.)