I spent part of my childhood living in Hong Kong/Singapore/Malaysia. I am treating this current short burst of hot weather the way i did in 1976 and how we did in my childhood.
Get up early, do anything requiring physical effort between 6.00-9.00am, then stay indoors with windows open and curtains drawn until the worst of the heat is over - 5.00 or 6.00pm and then get moving again.
have a cold bath or shower if it gets too unbearable and then just let it happen.
If you live in the kind of tiny stuffy unwindowed houses that are now built everywhere, get a water spay and watering can and damp everything; curtains, flooring, damp sheets across doors.