With a heat wave rolling across the country, it comes as little surprise that "portable air conditioners" is currently trending on Google. After a relatively cool spring in many parts of the country, Memorial Day weekend saw temperatures into the 90s in many parts of the southern and eastern United States. No heat-related deaths have been reported yet, but cities are already reviewing their plans to deal with the heat. One of the more controversial aspects of heat waves, sadly, is that certain parts of cities see higher mortality rates than others. Why is this the case?
