In my experience, I've tried many setups and you need these to stay safe:

• Fujifilm FAN-001 Cooling Fan
• ProGrade Digital CFexpress Type B Cobalt 165GB The fan is mandatory for humidity.

Just found this thread. If youre shooting 10-bit ProRes in that kind of heat, you need gear that handles high sustained write speeds without thermal throttling. Ive used several setups for the X-H2S and these are my top picks for staying light.

• Angelbird 512GB AV PRO CFexpress B SE offers incredible sustained performance for the price. Ive pushed it through hour-long sessions with no drops and it doesnt get as hot as the older cards.
• Wise Advanced 640GB CFexpress Type B PRO is a bit pricier but very reliable. It handles heat slightly better if youre doing back-to-back takes in the sun.
• SmallRig 3934 Full Cage for Fujifilm X-H2S is the best way to rig this body. Its much lighter than the Tilta alternative and leaves the battery door and fan mounting points completely accessible. Dont forget that Fujifilm FAN-001 Cooling Fan is basically mandatory for 4k 120. Without it, the camera will likely shut down within twenty minutes in South Carolina weather... trust me, Ive been there.

Agree about the fan, basically mandatory. But be careful with media choice. I had a card literally burn my thumb once because it couldnt handle the heat during a summer festival shoot.

• Delkin Devices 512GB Black CFexpress Type B stays cool during long ProRes takes because of its high sustained write speed.
• Angelbird 512GB AV PRO CFexpress B SE is okay for budget, but might thermal throttle sooner than the Delkin.
• SmallRig 3929 Full Cage for FUJIFILM X-H2S is way more compact.

Regarding what #3 said about "Just found this thread. If youre shooting 10-bit...", the VPG-400 certification is really the gold standard for avoiding those dropped frames. I had a session recently where my setup kept cutting out because the card reached its thermal limit. I moved over to the Lexar Professional 256GB CFexpress Type B Diamond Series and the data throughput stayed consistent even when the camera body felt like a toaster. Its rated for 1700MB/s write speeds, but more importantly, the sustained minimum is high enough that it doesnt struggle during long ProRes takes. If the SmallRig cage feels too common or bulky, the Tilta Full Camera Cage for FUJIFILM X-H2S is a solid alternative. It integrates well with the Fujifilm FAN-001 Cooling Fan without adding excessive width. Tbh, in high humidity like South Carolina, you wont just be fighting ambient heat but also the lack of evaporative cooling for the hardware. The fan is a total necessity for 10-bit work, even if it looks a bit clunky on the back. It pulls the heat directly off the processor which is where the X-H2S usually chokes first.