Years ago, I was caught-up in such a horrid weather. Day 1, it was quite okay, 36C. We were probably 30 miles away from nearest village connected by road. The next day, it rained cats n dogs, we didn't have tents. We could have reached natural cave in may be a couple of hours, but we gambled and that was the first time we built a shelter out of natural resources, watched it leaking throughout the night :D