http://www.ferrophototour.com/art-portfolio-bag/

Are acrylic paints safe storage at high temperatures?
I have a lot of art supplies in my hands when I go to my classes art in my school. I carry a lot of tubes of acrylic paint and brushes (which are in large bag), my laptop and books for my other classes, and a portfolio important for my work. If I go to my car and started the art materials During breaks, it becomes a task of walking with them in school .. Now that my photos and / or Security tubes (which means that generally cause toxic fumes, including cadmium yellow and orange) to store inside of my car at high temperatures? The Summer is glued to my area soon (Vegas) and the interior of my car, probably will rise to 80-100 degrees, unless you use the parking garage to my campus.
Yes, I always tried to park in a shady area, the trunk may work best for shade, but the heat is not good for them. If you are there day after day, can take a toll. Acrylics are water-based course and will begin to wither. His paintings will start to crack, unless you do not have time. You could to take a cooler with you and with a very small blue ice to keep cool. Having to heat a bit before using Tho. Good luck