Hail, the Great Brain!

I apologize for any cross-posting.  

In the last several years, I've been slowly developing procedures related to the library serving as warming center and also cooling center.  I'm happy to share what I've developed, but I'd love to see what you might have in place?  

When do you offer ice water or other cooling refreshment?

When do you add programming and for who (kids only or multi-generational)?

When do you extend hours?

When do you open on regularly closed days?

When do you okay overtime (if ever)?

Because there will hopefully be responses and/or discussion from multiple states, so that we have some idea for comparison, please include:

Note: For those of you in very warm climates, please note that we are in Michigan, so our definition of "hot" and "very hot" is relative.  Daily high temperatures in July are around 82°F, rarely falling below 73°F or exceeding 91°F.  We also regularly have upwards of 70% humidity, even without rain that day, which makes it all so much worse.

Thank you, all!