July is bringing extreme heat to North America, with wildfires raging in Canada and a heat dome affecting parts of the Southern US. The ProduceIQ Index shows that lime and iceberg lettuce prices have reached record highs due to supply issues caused by drought and cooler-than-average weather. Celery prices have also soared due to limited supplies, while table grape prices have returned to normal and round-type tomatoes have reached a ten-year high.