I had some yeast shipped during that massive 100+ heat wave last summer. Two different packs. One was DOA, but the other survived with a starter.
Make a starter and you'll be ok. But my rule after the experience above, I do not order liquid yeast. Local purchase only. Dry yeast is another story.
Fermenting: Gruit, Honey Porter
Souring/Funkifying: Brett C Old Ale, Lamebic '15, Lamebic '14, Flanders Red, Flanders Pale, Oud Bruin, Session Kriek
Bottled: Robust Porter, Gose, Lichtenhainer, Petite Saison, Saison, Mixed Berry Peppercorn Hydromel, Irish Red, Pale Mild, Dry Stout
Bottle Cellar: Brett B Tripel, Brett C Barleywine, Lamebic '11, Quad, Tripel, Brett C Bitter, Wild Cider, Sour Stout, Wee Heavy, 100% Brett B. Red, 100% Brett L. Kriek