Vibes and advise please

Today is a nice sunny Wisconsin spring day with temps in the low 70's.
About 5 hours of digging stone mulch and wheelbarrowing it to a pile I stopped sweating. That is my 1st sign for heat exhaustion. I worked about another hour and packed up the truck and went home. I was wearing a tank top and shorts and my gardening hat and drinking Gatorade. But the area was in full sun for most of the time I was working (I started at 7 am with plans on working for about 8 hrs) I ran the A/C in the truck (and ran a red light too) Took a shower which chilled me. Put on a sweatshirt had a regular soda and some chips (for salt and sugar) I was a bit nauseous too. Then laid down for a nap of about 90 minutes.
Even though I had sunscreen on I burnt the tops of my thighs (attractive!!) a bit on the arms and even with the hat my face is warm.
I have struggled with heat exhaustion in the past so I know the symptoms.
Anyone esp those in warmer climates give me some advise on how to prevent.
More breaks?? There is a small shady area to sit at this location but others I may not be so lucky. My only other thought is to not work in the sun say from 11-4. This is involve more driving back and forth but in the long run a bit more safer for me.

I have been doing landscape work for years. My clients are the same just about each year. So I know what areas are in the shade during what part of the day.So I try to plan to be in the shade as much as possible. For the really hot days I do my Clients that are right on the ocean so I get some cool breezes if I'm lucky. If I do have to be in the sun , then frequent breaks and I use the hose to dose off and cool down over my head and arms ect. Stay well hydrated. Sun Screen is a must! A wet handerchief tied around your neck.,keep wetting it with the hose.
You know when your over heated. Some days you just have to give up and go home!

You know, ive always wondered why i dont sweat, atleast not much like other people do.
I never sweat like those people who are constantly running or working hard, but instead it makes my body swell.

It could also help to wear Sunscreen 60+ spf
I hope you get better soon gail!

ohh and dont forget to smother aloe vera over the burn areas

The hose idea sounds great other than that a good hat and lots and lots of water

I hope your sunburn heals up soon! That hurts

Water, regularly, inside and out! Drink up to 2 litres during the day - it is better than any soda, and keep pouring/hosing it on you. Plus of course, hats, scarves etc. I keep a pair of long but very loose almost chiffony cotton pants for outdoor work - they look silly but do help to keep me cool.

Unfortunately for me no hose available. If I did hose myself down I would get really strange looks!!! I do keep a wet washcloth in a Ziploc bag to wipe my face down. I think the thing is to take a break in the shade if its too hot!!

I dont know much about that, BUT THE WEATHER WAS AWESOME TODAY HEY?!!!

I loved it! It's so so nice.

I did a little gardening today too, just drank lots and lots of water, and was ok!

Sunscreen for sure too gail...dont leave home without it. Other than that, Yea...a hat.