For this project, the most important anticipated climate change impacts include:
Excessive fluctuations between dry and wet periods in the Mid-Atlantic may create conditions favoring drought and moisture tolerant trees, whereas trees that prefer well drained soils and consistent conditions will face stress.
Average summer high temperature of 87°F is projected to increase significantly to 93°F - 97°F by the 2080s. These values are projected to increase 2.5-3°F by the 2020s, 5-7°F by the 2050s, and as much as 6-10°F by the 2080s.
Extreme heat days and heatwaves will last longer and occur more frequently. Projections indicate an average of 18-20 days with temperature exceeding 95°F by the 2020s, 30-45 days by the 2050s, and 40-70 days per year by the 2080s.
Areas that already experience urban heat island effects within the District will be exacerbated as more frequent heat waves occur, leading to areas that are too hot, too often.
Overall, precipitation events in DC are projected to increase both in intensity and frequency. The results also indicate that these extreme rainfall events will become more frequent.
An increase in intense rainfall events may result in extensive damage from flooding to property and infrastructure including trees.