Have to vent a little my grandmother will be 70 this year and her kids (my mom and uncles) want to do a surprise…

Have to vent a little my grandmother will be 70 this year and her kids (my mom and uncles) want to do a surprise something for her mid July. So I asked my mom what they were thinking she said probably something at the zoo cause my uncle has a hook up. I swear whoever had this "bright" idea is not the smartest. First off we live in Texas second off we literally had no winter this year which means 105+ heat third my grandmother is not in the best health and does horrible in the heat and last but not least I'll be 28 weeks. I hope my family takes all this into consideration because our family has not all been together in over 5 years I know this will mean a lot to her but outside in the tx heat middle of summer = not a good time!