Keeping baby cool in Texas

Normally Texas is in the 90°'s in the summer. It gets to 110 sometimes but I wouldn't bring her out in heat over 100 ever. I was wondering if it's safe to bring her out while I tan some days if it's in the 90's. If there are good cooling tips I could use. I've heard of people putting a sheet over the play pin, misting their baby with a spray bottle, putting a frozen gallon bag under a blanket in the play pin, bringing out the frozen teething rings. Would you? Have you? It would be no more than 30 minutes. She's 4 months old