My 92 Year Old Mom Is In The House With

My 92 year old mom is in the house with it being painted. According to her caregiver it smells (my mom says no) and very warm. Her blood pressure was 189/87. The caregiver got her to turn on the air conditioning and it dropped to 183/86. could the heat and paint be causing this? I have had them go outside and wait 15 minutes to see if the fresh air continues to bring the pressure down. I live 7 hours away at what point should they call an ambulance?