Forty-eight states face moderate drought, which affects groundwater supplies, agriculture and river transportation

This summer's scorching heat may be over, but across the United States a lack of soil-absorbed rainfall has left most states facing drought conditions. "More than 150 million people in the country – and 149.8 million in the 48 contiguous states – are in a drought this week. That is about a 34% increase since last week and an over 150% increase since last month," reports Marina Dunbar of The Guardian. Drought is present in every state except Alaska and Kentucky, in fact, this is the greatest number of states in drought in U.S. Drought Monitor history. 

Drought conditions aren't just about lack of rainfall, they "are driven and exacerbated by abnormally high temperatures that can quickly suck moisture from the atmosphere and the earth," Dunbar explains. "Droughts can occur even when there is slightly more rain than usual, depending on the frequency of rainfall. If there is a lot of rain all at once, it’s difficult for the water to be properly absorbed into the ground."

When droughts occur, groundwater supplies get tapped, which can take weeks, months or centuries to replenish. "According to the National Integrated Drought Information System, droughts will increase an area’s reliance on groundwater. Groundwater provides more than 40% of the water used for U.S. agriculture and domestic water supplies. Increased pumping during droughts can reduce the future availability of those supplies."

Meanwhile, dry conditions have a domino effect on water sources, agriculture production and commodities trading. "Low water levels on rivers and other waterways [can cause] ports and other water-borne transportation to become limited due to a reduction in available routes and cargo-carrying capacity, which increases transportation costs. . . That cost increase is ultimately transferred to consumers, who see it in the form of higher-priced products, groceries and other commodities."