“…Environmental factors that influence patient presentations at mass gatherings, and are reported in the literature, include crowd attendance and density, venue characteristics (unbound versus bound; extended or focused; and local terrain), type of event, outdoor or indoor, weather (temperature and humidity), availability of alcohol or drugs, and whether attendees are predominantly seated or mobile. 5 There are many different ways of reporting environmental variables within the literature; these include wind speed, 6 dew point, [7][8][9][10] time of day and day of week, 7,11 air quality, [12][13][14] precipitation, 9,10,[14][15][16][17] Wet-Bulb Globe Temperature index (WBGT), 18 historical data, 7,8,11,12,17,[19][20][21][22] cold weather, 7,14,15,17,[23][24][25][26] allergic reactions, 27 availability of free water, 8,19,24,28 altitude, 15 and the presence of ethanol. 7,17,20,…”