Apparently no one died or was overcome manicuring this guy's no-shade lawn.
...Heat index was at 100. (Hey, that coulda been higher, right?....) 'Heat warnings' in effect (excerpt below).
(Image: "(From source) This cholera patient is drinking oral rehydration solution (ORS) in order to counteract his cholera-induced dehydration. This image is a work of the National Institutes of Health, part of the United States Department of Health and Human Services. As a work of the U.S. federal government, the image is in the public domain.")
Excerpt from NWS 'excessive heat warning':
"AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES WILL OCCUR....
TO REDUCE RISK DURING OUTDOOR WORK...THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 9 1 1."