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First time homeowner here so please forgive the newbie question. I'm in Texas so our houses aren't built for the cold. We're going through freezing temps at night right now, with temps getting up well above freezing during the day. I woke up this morning to my kitchen faucet not having water (at all) when turning it to the hot setting. It's the type of faucet that you just turn left (hot) and right (cold) and lift to open. The cold water side is fine. The two other faucets found in the two bathrooms have hot water without issues, but they have separate faucets for hot and cold. I've been religiously dripping all our faucets every night since last week. Is it possible something froze? And what I can do to start figuring out the problem and possibly fix myself?

Thanks in advance!

Edit: Here's what it looks like under the sink. The upper left tube is what I believe is the hot water, the right for cold, and the bottom goes to the dishwasher.

Upd

My power is generally pretty reliable, but when it does have issues, it often flickers violently. More than once, I thought the control board in my fridge got fried, but was luckily able to do the refrigerator equivalent to Ctrl+Alt+Delete and reset it.

I have an extra 800W UPS laying around, so I figured I'd give it a try and see if it would run it. I'm not really looking to use the UPS to keep it powered during an outage, just to deal with the power flickers/surges/brownouts that may damage it (surge protectors won't protect against brownouts). Any additional cooling time during an outage would simply be a bonus.

To my surprise, it works. Not only works, but only seems to draw between 110 and 160 watts (compressor on, door open). However, I expected it to draw power in the 700-900 watt range. Granted, the last time I worried about refrigerator wattage was years ago when I lived in the boonies, had an older fridge, and had to resource-manage when I was running from the gene