Is there any low tech thing that the average person in India (for example) could do to survive in these super heated conditions?

I keep hearing a lot about unsurvivable heat (specifically in central India, which is on my news right now) and things like wet bulb temperature etc. that to be honest I don't fully understand.

But is there ANYTHING the average person can do to survive these conditions without things like modern A/C? Could you dig a "climate shelter" enough feet down that you reach an ambient temperature, or sleep in damp sand, or create some type of reflective cover with accessible materials?

Obviously evacuating an entire nation is not a thing that can happen, so is there anything the average person or family could do to increase their chances of surviving until they could vacate to somewhere cooler?

I am concerned and honestly uneducated on this topic, and I live in an area where we are temperature insulated so when other nations are seeing 10 degree changes we might see .5 in the same time frame.