Fact check: Is half a degree of warming really such a big deal? Minimal temperature increases like 1.5 or 2 degrees Celcius might sound insignificant, but when it comes to our planet they can have a massive impact. DW looks at the facts. When a human being's temperature rises from a healthy 36.6 to 38.6 degrees Celsius (97.8 to 101.48 degrees Fahrenheit), it has consequences. Just a seemingly minor increase leaves the body feeling unwell and unable to function normally. It's a similar story for the planet. Since the late 19th century, when burning fossil fuels was becoming more widespread, the Earth has warmed by an average of more than 1 degree Celsius. Some places, however, have warmed beyond that level.