With all due respect, we're talking about 8~9 yrs old kids right?
Has the social norm changed so much that we all don't believe kids that age run around all day - hot or cold?
Two 20 minute halves? So 40 minutes total with at least 5 minutes half time, right? With subs, since everyone plays at this age, the whole thread is that the other team didn't want to give a break more than an hour between two games?
Such anger and really unnecessary tone by OP. "This coach is a total dooch bag. He Puts winning over the girls safety. These girls are only 8-9 Years old, not to mention playing in 90 degree weather with no rest." There was a break but you clearly felt it wasn't long enough from your perspective. You can always hold your kid out of the next game. You as a parent need to make that call.
All I'm saying is that are we being over protective and making a big deal of nothing? There WILL BE worse things that will happen in your youth soccer journey if you continue so lets keep it real....