Technically, it hit a temperature record on the 4th day as well. If this isn't the most bizarre symbol of climate change, I don't know what else would be.
It's isn't necessary a symbol of climate change. You need to perform deeper statistical analysis to establish that causation. For instance, you need to create separation from a rare but possible event even without climate change, versus a causation strictly involving climate change. There were record days in the past as well, and they were not attributed to particular causes. Evidence of causation requires much more rigorous proof and thoughtful analysis.
Speaking of thoughtful analyses, a symbol is something that stands in for something else, either by convention or to embody something complex and esoteric into something simple and relatable. A town hitting 3 country-wide temperature records in the world's second largest country, then burning down may not be evidence of climate change, but it can certainly be symbolic of climate change. Symbols are the critical foundation of human understanding, cognition and communication, so having a powerful and appropriate symbol of a complex issue could be even better than one more data point.
The Australian bush fires? The Texas storm? There's so many to choose from!
Or the Medieval Warm Period? [0] Or the Little Ice Age? [1].