Working While Pregnant?

So this is my second year or season working at the Waterpark inside of concessions! Where I'm from it gets extremely hot & of course Waterparks are always extremely busy so I never get to have a seat & rest my feet. I'm 26 wks & 6 days & the heat is something I'm not good with. I absolutely love my job but it's so hot this summer I'm starting to think I should just call it quits for me & my babies sake . Any suggestions on what I should do ?