If you are looking for simple fact sheets on how El Niño will affect your area or other regions around the country, including US territories, NOAA has collected a series of links to fact sheets at https://www.ncdc.noaa.gov/news/regional-el-nino-impacts-outlooks-assessments.

There are also some links to other El Niño information at this site.

Source: NOAA
Source: NOAA