There were a number of EZE paxs at the MIA AA terminal yesterday waiting for hotel shuttles in the MIA heat wearing coats. They had AA hotel vouchers in hand (their connecting flight to JFK got cancelled) and looked very uncomfortable in their coats. This morning there were more paxs (from EZE I assume) boarding an AA flight to JFK again with again coats on. Did someone not advise them of August weather in MIA and New York.