Garage fishroom temp issue in summer?

Who here has a garage fishroom with multiple tanks and without a chiller?
How do u deal with the heat during summer?
I live in oc where some days can be high 90s in summer outside.
I do plan to keep garage door open 6-8" to allow air in and out through fans with temp controller.
But since im only in planning stage, i am worried if it will be enough?
I plan on keeping cichlids.

i was told i have insulation on my garage doors. but rest arent.

Vincent Tran said:

I live in socal definitely don't need a chiller with these tropical fish in big tanks... Plus the garage is shaded so the temps will not be too crazy.

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Is your garage well insulated and ventilated?
Do u have heating and ac in it?
Another socal guy said sometimes his water temp goes to 93 but fish r fine.