The high recorded at my house yesterday was 37 centigrade, (98.6 Farenheit), in the shade with 78% relative humidity.
According to the National Weather Service the heat index is equal to 148 F or 64 C.
A Table of Heat Index values, published by U.S. National Oceanic and Atmospheric Administration
States that a temperature of 93 Farenheit becomes dangerous at these high humidity levels and today’s levels are extremely dangerous.
It is important to drink as much fluid as possible, avoid physical excercise, alcohol and stress.
No wonder that Brazilians head for the beach!!!