Know your symptoms.
Then do NOT ignore them.
Extra water, extra electrolytes. (I use trace minerals, but use what works for you)
Don't be afraid to slow down.
Don't be afraid to get Uber, or call anyone for a ride.
No ride is worth dying for.
ALso:
Heat stroke symptoms can manifest hours after you finish a ride, have a shower and think you're in the clear.
KNOW YOUR SYMPTOMS!!
Each persons' is different