Hi blueberry! I took racewalking classes taught by olympians in california in the 1980s. At the time they told us that if the heat plus the humidity was over 150, then maybe dont go out. The attachment says 180, so maybe i have a wimpy memory. The pace adjustments in the table would equal work / calorie, i assume. You continue to inspire me. I have become much more active - for me!

HOW TO CALCULATE PACE ADJUSTMENT FOR HOT WEATHER RUNNING — RunFit MKE