Provided that the only reason your water is dangerous to drink is that it contains pathogens, any of the above methods should help.
It is critical to have a regular water intake during a heatwave, and you must figure out ways to preserve your body's water.
Maintaining a small garden and chickens is critical. You can stockpile supplies and seeds, so you're ready to scale when catastrophe strikes.
As a survival instructor, preparedness writer, and CERT Program Director, I have come across claims about water storage and treatment technology and practices.
Even though Chlorine tablets are considered more effective than Iodine, each chemical has its good and bad points when it comes to water purification