Table 2. Exposure Scenarios.

scenario name	time period	electrical grid status	scenario conditions
power on	present day	operational	thermostat set point of 24 °C (75 °F) for residential structures with central AC systems.
power off	present day	nonoperational	no mechanical cooling for any structures for 48 h; power restoration sequenced by proximity to electrical substations over 72 h.
street trees	present day	nonoperational	all roadways with exception of interstate highways assumed to be 50% covered by tree canopy (tree characteristics are broadly representative of each region).
cool roofs	present day	nonoperational	roof material albedos for all buildings set at 0.88.
mid century	2050s	nonoperational	outdoor temperatures representative of a modeled heat wave in ∼2055 in each city for the RCP 8.5 scenario; no heat management strategies in effect.
late century	2080s	nonoperational	outdoor temperatures representative of a modeled heat wave in ∼2085 in each city for the RCP 8.5 scenario; no heat management strategies in effect.