My daughter lost the 'key' to the wheel lock on her rims. How do I remove the wheel to change the tire ? Is there some gadgets I can buy ?
Have you actually experienced this, or are you basing your question on movie depictions of this event? It happens that way in movies because it makes for a much more spectacular visual effect. In real life, water heater failures are more likely to involve a leak from a valve or pipe joint, as these are the weakest spots in the system and most likely to fail under pressure.
If it is battery operated only, then you are probably correct it needs a new battery. If it hard wired then it may have an internal problem that you may not be able to fix. You might try cleaning it the best you can and see if that helps. Whatever the problem is, the cost of a new alarm is a very small price to pay compared to the other option should you have a fire.
Mine does the same thing. The high pitched sound hurts her ears. When this happens, pet him calmly and if you talk to your dog (I do lol) use a soothing voice to calm him. Another idea, if you think you need to use high heat to cook something, tie your dog up outside during that time so he's away from the area and distracted.