The last time I experienced heat like this was in the 70's out in NW MO when whe had a really big garden and the actual them went to 100+ degrees frequently. I had a friend that was old enough to remember the summer of 1934 when farmers put their beds out on there wrap around porches so they could sleep at night. The farm ponds that cattle drank from dried up and cattle died from lack of water. It didn't get that bad in the 70's but my friend was on guard as bad as it did get.