That's why I love the Greek word καύσωνας (pronounced kaf-so-nas, translates to "heatwave"). "Heatwave" still feels too neutral, just a vessel for factual information, while KAFSONAS breathes out fire like a dragon.
With Yet Another Heatwave heading in, here are a few pointers from a person who's dealt with AC and cooling a housing space:
If you have AC:
1. It's far easier to KEEP a space cool than MAKE a space cool. Start the AC before it gets hot. It's easier on your AC unit and your power bill.
2. Install a modern programmable thermostat. They're more accurate and allow for more granular control. $$
3. Make sure your condenser is sized appropriately for the space it's cooling. Having a too-small one won't save you money in the long run, as it'll have to work harder over its life span. $$$$$
4. Regular maintenance is A MUST. Check your filter every season and change if necessary. It's essential to proper functioning of the unit. Clean the outside of the unit, if necessary. $-$$$
In any case:
1. KEEP THE SUN OUT. Close your blinds and drapes. Tape foil in the windows. Whatever it takes, especially if you have single pane windows. Look into thermal insulated drapes that run to the floor (bonus: they help keep the cold out in winter, too). $-$$
2. Use fans to move air around. Install ceiling fans, if you can. Set box fans in open windows on the shaded side of the space to vent hot air if possible. $
3. Portable rolling AC units are surprisingly effective in cooling small spaces. Make sure they're vented outside. $$$
4. There are tutorials online for homemade evaporative cooling setups. $
5. Personal fans help. I have one that sits on my neck with two fan heads. A spray bottle with water helps, too. Keep it in the fridge for extra coolness. $
6. Don't be proud, especially if you have chronic illnesses or are on medications that affect your ability to endure heat. Find a cooling center, rent a hotel room, go to an indoor shopping center or movie theater. It's not just comfort - it's healthcare. $-$$$
7. Keep hydrated. Use electrolyte drinks to replace minerals lost due to sweat. Know the symptoms of heat exhaustion and heat stroke. $
8. Check on your neighbors!
9. Consider your insulation. It settles and breaks down over time. It might be time to top it off. $$$-$$$$
Be careful and take care.
First run of the year with a double digit temperature: 10C.
Edit: positive double digits.
Deadly heat thresholds have already being crossed in six recent heat waves, study shows https://phys.org/news/2026-04-deadly-thresholds.html

Deadly heat wave events are occurring at temperatures and humidity levels previously thought to be survivable, according to a new paper by a team of international researchers, including from The Australian National University (ANU) and the University of Sydney. The research is published in the journal Nature Communications.