Cheradenine
If your house has lead soldered pipes that could be an issue. Many (most?) plants tolerate lead well, I wouldn't want to use it on my tomatoes though. Radon could also be a problem for indoor air quality.
As far as temperature goes plants wouldn't be exposed to temps above body temperature, even in a hot climate rain is going to be well below that. In my experience seedlings especially do not like warmer water, when I use it I water around the plant and not at its base.
Whether your plants can benefit from increased minerals is going to depend on the plants needs, the soil mineral content, and the mineral content of your water.
It can be so much worse if they have Wandering Womb
In the middle of the flanks of women lies the womb, a female viscus, closely resembling an animal; for it is moved of itself hither and thither in the flanks, also upwards in a direct line to below the cartilage of the thorax, and also obliquely to the right or to the left, either to the liver or the spleen, and it likewise is subject to prolapsus downwards, and in a word, it is altogether erratic
For a different angle on this story
https://www.theguardian.com/science/2025/mar/29/the-physics-community-has-never-split-like-this-row-erupts-over-plans-for-new-large-hadron-collider
Posted without judgment since I'm not a scientamatician