Sewer Gas with newborn in home

So we would get a sewer gas smell anytime it rained. We tried everything to fix it so that it didn’t happen again when baby got here. We thought we fixed it because it’s rained a lot recently and nothing happened. Well this morning I woke up to sewer gas (it hardly even rained!).

We have the windows open (baby bundled) and my husband poured water down all the drains. I’d like to just take baby to my grandparents but they live 30 min away and it’s snowing. Baby is only 4 weeks old and I’m terrified the gas will hurt him but I’m also afraid to make a 30 min drive in the dark in the snow while I’m exhausted

I just don’t know what to do