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   "description": "<DIV STYLE=\"text-align:Left;\"><P><SPAN STYLE=\"font-weight:bold;\">Dates of Images:<\/SPAN><\/P><P><SPAN>Pre-Event: May 2024<\/SPAN><\/P><P><SPAN>Post-Event: 7/9/2024<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Date of Next Image:<\/SPAN><\/P><P><SPAN>Unknown<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Summary<\/SPAN><SPAN>:<\/SPAN><\/P><P><SPAN>The Black Marble (BM) images were created by the NASA Black Marble Science team, with directed funding the NASA-Google Partnership program. The images map the impact of flooding and wind from Tropical Storm Beryl around Houston, Texas and its effects on electric grids. The baseline image is from May 2024, a cloud-free, moon-free composite, and the \u201cafter\" image is from July 2024. There is a layer to display where clouds are present in the \"after\" images. This comparison between the images is meant as a visual assessment of outage impacts from the extreme heat to aid various partners who are working to deliver emergency aids to local communities. Power outage maps like these help disaster response efforts in the short-term as well as long-term monitoring during the crucial stages of disaster recovery.<\/SPAN><\/P><P><SPAN>From the BM data, raster calculators between the baseline and July 9th were performed. The resulting symbology and information represent pixels that likely suffered a large amount of power loss for a given date relative to baseline.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Suggested Use:<\/SPAN><\/P><P><SPAN>NOTE: NASA\u2019s Black Marble nighttime lights product (VNP46), and as such are a \u201cmodelled\u201d or \u201cbest guess\u201d estimate of how lights are distributed at a 500m resolution. These images should be used for visualization purposes, not for quantitative analysis.<\/SPAN><\/P><P><SPAN>The image is in a yellow-red color scale. Red indicates more severe impacts. Baseline data was collected across several clear days in April 2024.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Satellite/Sensor:<\/SPAN><\/P><P><SPAN>The primary data source, NASA\u2019s Black Marble nighttime lights product suite (VNP46), utilized to generate this product is derived from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi National Polar-orbiting Platform (SNPP) along with high resolution base layers - Landsat derived normalized index products (NDVI and NDWI) and OpenStreetMap (OSM) derived road layer<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Resolution:<\/SPAN><\/P><P><SPAN>500 meters<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Credits:<\/SPAN><\/P><P><SPAN>NASA Black Marble Science team<\/SPAN><\/P><P><SPAN>Please cite the following two references when using this data:<\/SPAN><\/P><P><SPAN>Román MO, Stokes EC, Shrestha R, Wang Z, Schultz L, Carlo EA, Sun Q, Bell J, Molthan A, Kalb V, Ji C. Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PloS one. 2019 Jun 28;14(6):e0218883.<\/SPAN><\/P><P><SPAN>Román MO, Wang Z, Sun Q, Kalb V, Miller SD, Molthan A, Schultz L, Bell J, Stokes EC, Pandey B, Seto KC. NASA's Black Marble nighttime lights product suite. Remote Sensing of Environment. 2018 Jun 1;210:113-43.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Point of Contact:<\/SPAN><\/P><P><SPAN>Ranjay Shrestha<\/SPAN><\/P><P><SPAN>NASA Goddard Space Flight Center<\/SPAN><\/P><P><SPAN>E-mail: ranjay.m.shrestha@nasa.gov<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Additional Links:<\/SPAN><\/P><P><SPAN>NASA\u2019s Black Marble Product Suite<\/SPAN><\/P><P><SPAN>Román, M.O. et al. (2019) Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PLoS One, 14 (6).<\/SPAN><\/P><P><SPAN>Román, M.O. et al. (2018) NASA\u2019s Black Marble nighttime lights product suite. Remote Sensing of Environment. 210, 113\u2013143.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Esri REST Endpoint:<\/SPAN><\/P><P><SPAN>See URL section on right side of page.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">WMS Endpoint:<\/SPAN><\/P><P><SPAN>https://maps.disasters.nasa.gov/ags04/rest/services/texas_extremeheat_202405/Power_Loss_Maps_for_the_May_2024_Houston_Texas_Extreme_Heat_Event/MapServer/WMSServer?request=GetCapabilities&amp;service=WMS<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Data Download:<\/SPAN><\/P><P><SPAN>https://maps.disasters.nasa.gov/download/gis_products/event_specific/2024/hurricane_beryl/blackmarble/<\/SPAN><\/P><\/DIV>",
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