drought May 11, 2022 7:22 pm Water Supply and Drought Impact Raj Mathai speaks with snowpack expert Dr. Andrew Schwartz from the Central Sierra Snow Lab to discuss if the season snow these past few weeks are helping with California’s drought and water supply. US & World Videos 2:55 Checking in on the Sierra snowpack 1:27 Christmas trees stressed in warmer climate 1:40 Air pollution concern for respiratory health, study says 1:29 UN hosts climate change conference in Azerbaijan 2:49 California reservoirs' levels drop after a summer of record heat and fire danger