If it is not or cannot be stopped, it can develop into heat stroke in which body organs start to fail. Signs include rapid heartbeat, seizures, coma, and eventual death.
Treatment:
At the first signs of heat stress, immediately give your Maltipoo cool water (if away from home, this is a good reason to bring along water as discussed in
Tip # 1) and work to cool down your puppy or dog (the cooling mat as discussed in
Tip #2
will help with this, and if you are away from home and do not have access to an air-conditioned building, bring your dog into the shade).
Do not use ice, this can shock a dog. Instead, place damp cool towels gently over his body and use fans to circulate air flow.
For signs pointing to beginning stages, many vets recommend bringing down a dog's temperature before transporting him to the vet. If signs are severe or you do not have access to water and other treatment necessities, this may warrant immediate transportation.
So, you'll want to have a canine thermometer and call your vet for instructions.
Note that a dog's normal temperature is between 101 to 102.5 degrees F.
With heat stress, it will rise to 103 F. At 106 F, this points to heat stroke and is considered life threatening.