By pregnancy week 33 many women start experiencing mild swelling or edema. This pattern often remains as you continue your pregnancy week by week. Some women find that swelling is worse during warm weather or in hot climates. If you are experiencing your third trimester in the middle of summer more kudos to you! You are probably very warm and quite bloated. Just be sure to drink plenty of water to keep your body as hydrated as possible. This will help with swelling and improve your comfort.