WEBVTT FILE 1 00:00:00.000 --> 00:00:04.000 2 00:00:04.000 --> 00:00:08.000 There are currently more than 360 fires throughout California, forcing approximately 50,000 people to evacuate.  3 00:00:08.000 --> 00:00:12.000 4 00:00:12.000 --> 00:00:16.000 The LNU Lightning Complex Fire, is around 350,000 acres in size, making it the second-largest wildfire in California history. 5 00:00:16.000 --> 00:00:20.000 6 00:00:20.000 --> 00:00:24.000 The plumes of smoke can be seen from Earth-observing satellites, billowing out 250 miles into the Pacific Ocean. 7 00:00:24.000 --> 00:00:28.000 8 00:00:28.000 --> 00:00:32.000 California’s weather has been especially conducive to fires, with heat waves, droughts, and lightning occurring simultaneously. 9 00:00:32.000 --> 00:00:36.000 10 00:00:36.000 --> 00:00:40.000 11 00:00:40.000 --> 00:00:44.000 The state has had an exceptionally dry start to 2020, ranging from abnormally dry to severe droughts in some areas.  12 00:00:44.000 --> 00:00:48.000 13 00:00:48.000 --> 00:00:52.000 The droughts, coupled with heat waves bringing land surface temperatures up to over 120 degrees Fahrenheit, have created precisely what fire needs to burn: Fuel.  14 00:00:52.000 --> 00:00:56.000 15 00:00:56.000 --> 00:01:00.000 16 00:01:00.000 --> 00:01:04.000 Dried-out trees and brush make for sustaining, fast-spreading fires. A recent surge of lightning provided the spark in many places. 17 00:01:04.000 --> 00:01:08.000 18 00:01:08.000 --> 00:01:12.000 In one 72-hour period in August, there were nearly 11,000 lightning strikes over the state.  19 00:01:12.000 --> 00:01:16.000 20 00:01:16.000 --> 00:01:20.000 21 00:01:20.000 --> 00:01:24.000 Some of the fires that started due to those strikes have combined and formed large complexes of fires, like the LNU Lightning Complex and the SCU Lightning Complex.  22 00:01:24.000 --> 00:01:28.000 23 00:01:28.000 --> 00:01:32.000 24 00:01:32.000 --> 00:01:36.000 Air quality is also a major issue. Wildfire smoke carries tiny particles into the air called aerosols that can affect breathing. 25 00:01:36.000 --> 00:01:40.000 26 00:01:40.000 --> 00:01:44.000 On August 19, atmospheric testing showed that Northern California had the worst air quality in the world that day. 27 00:01:44.000 --> 00:01:48.000 28 00:01:48.000 --> 00:01:52.000 Black carbon, or soot, is also a harmful byproduct of wildfire smoke, and can be seen here through NASA’s GEOS-FP model.  29 00:01:52.000 --> 00:01:56.000 30 00:01:56.000 --> 00:02:00.000 But California is no stranger to wildfires. As the state becomes drier and hotter, fire seasons burn longer and more intensely. 31 00:02:00.000 --> 00:02:04.000 32 00:02:04.000 --> 00:02:10.475 EXPLORE EARTH NASA