Dreadlock Styles and Dread Styling
it will slow the process some but passing out from heat strokes not a better option
only recommendations, use your dreads not the band to tie it up and leave it down whenever possible..like indoors out of the heat
last recommendations not so much about dreads...
move away from the coast to higher ground (i got to do that myself) with climate change, and the increase in earthquakes from fracking and all that, (like excessive heat and drought causing severe wildfires) cali isn't the safest place to live (from research the mountains in tennasee might be safest but that's factoring in the way overdue eruption of the Yellowstone super volcanoe)