This is SARS-COVI-2...Severe Acute Respiratory Syndrome Corona Virus - 2....it's not an influenza virus. It's more akin to an airborne pneumonia virus. And how it thrives in warm weather is largely unknown...it seems to be spreading in some warm places right now such including Singapore.
Most viruses die at 86 F - Singapore is just starting to reach that temp, and has few new cases ...