Evaporative cooling.
Cool, damp cloths, especially to place around your neck or on your face and wrists. Cool showers. Avoid any use of the oven and minimize use of the stovetop or any other device which produces a significant amount of heat. Keep blinds/curtains drawn while the sun is out. Open these and the windows at night. If there is any breeze and your home’s layout is amenable, open windows to promote cross-flow. And, if safe, doors. Lightweight, breathable clothing. Avoid going out during the hottest part of the day unless it’s to somewhere air conditioned. If you drive, try to park in the shade and cover your windows when parked to reflect sunlight. If public transit, heavier on the avoiding going out during the hottest part of the day. Hydrate. This means electrolytes, not just water. Cotton sheets can feel cooler than not using any bedding at all.

Don’t be overweight, don’t drink alcohol, stay indoors, have a portable fan with you always, drink lots of water

Adding to other suggestions: wear loose fitting clothes, ideally of natural fibers (cotton and linen are best). Wet your hair and neck when outdoors.

If your house is humid, decreasing humidity can decrease the feel of heat as well

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Put up exterior shades on the south side of your home or at least outside your windows. It keeps the direct heat from the sun from baking your walls and windows, and you on the other side. Yeah boy, window awnings and sun shades are in.

Solo wet T-shirt contest.

Lived in a hot and humid place my whole life. Wear as little clothing as you are comfortable with and build a swamp cooler if possible. Also try filling the bathtub with cool water (use ice if you have to) and chill in it

• for office-jobs, a USB-ventilator blowing over the keyboard and hands
• spray bottle to wet feet & back, it’s auto-regulating too!

The trick with the latter is, the body doesn’t even get in the uncomfortable zone (i’m not even flaccid). But careful or you’ll get a cold. Others also mentioned a foot bath for the same effect.

Ice packs, fans, portable ac units, misting yourself. It’s not so bad after you’re 35+

My studio has been stuck at 32°C for the last two weeks. Today it’s finally as hot inside than out. I haven’t closed my windows in a month.

I am constantly searching for a mobile AC unit that is neither sold by scalpers (found a weaksauce one at the price of a fixed unit) nor delivered in 3 to 6 months.

(I am currently praying my ten years old desktop fan won’t crap out: the plastic is now very brittle and it’s pretty out of balance.)

So I mostly get by by being so lacking in restful sleep, I’m too out of it to notice the heat. Oh, and cold showers.

Move slowly, be slow

Some options in approximate order of increasing effort:

• Drink iced beverages.

• Have fan blowing at you.

• Cooling vest, possibly with with ice packs.

• If low humidity (probably not in the UK), evaporative cooler.

• Air conditioner.

Enjoy it, soon enough it’ll be cold & grey again… in fact it’s quite overcast in the east this morning, I’m thinking about putting a jumper on

I made a post about my most effective tip. Works pretty well.

Fans are cheap and effective. The ones that stand on a pole. One in every bed room - point it at you while you sleep. You’ll get used to the noise pretty quickly. Koreans think that pointing a fan at you while you sleep will kill you but ignore them.

Carry an umbrella for mobile shade. Do not leave the house without it.

Hammocks. Preferably a mesh one for ventilation.

Do not go outside in the middle of the day. Have a long nap instead, then stay up late and party. The Spanish know how it’s done.