my dad is 87 yrs old, lives in a very old building with no A/C....it has been in the 90 s the last two days.....he says he has not been outside, just sitting inside with the fans on. He says he just cant take the heat outside but that he s fine. However, his speech is slurred and slow like someone who has been drinking ( he doesn t drink EVER ). He says other that being tired and feeling a little lethargic, he s fine.....he is usually extremely alert, focused and mentally sharp. However, he sounds a little confused and totally forgot his doctor s appointment yesterday. He only takes BP meds, no other meds. Does this sound like heat stroke or heat exhaustion, even if he hasn t been out in the sun? He s not dizzy, or nauseous . He says he s not wearing his dentures and maybe that s why his speech is slurred. My dad always wears his dentures....he lives alone and I only talked to him on the phone.....I haven t gone to check on him.....he keeps saying he s fine. What should I do.