Lowest humidity we've had was 2% and temp that day was 117 Fahrenheit.
Yes, commuted that day on the bike; wet my cycling cap and bandana and pedaled. Hat/bandana were bone dry 15 minutes later. Eyeballs were burning behind my glasses and heat from blacktop was felt right through soles of my shoes. Did let a couple pounds of air out of the tires.
Fortunately 100 degrees with single digit humidity is not that bad; however try and find shade! Have seen folks waiting for the bus standing in the shade of a telephone pole.
Bahrain's heat and humidity probably is caused by proximity to the water.
Have cycled in 98 degrees with 98% humidity in Maryland . . . sweat beads standing on my forearms at 7 a.m. . . . not fun!
. . . but its a dry heat in Arizona!
Pedal on TWOgether!
Rudy and Kay/zonatandm