; regulations. Sec. 304. Grants for providing safe residential temperatures in all federally assisted dwellings. Sec. 305. Box fan expenses reimbursable through health saving accounts. Sec. 306. Study on air conditioning recycling and rebate program. Sec. 307. Report on revising State allotment payments under the Low-Income Home Energy Assistance Act. Title IV—Urban Development Sec. 401. Grants for construction of usable public water features. Sec. 402. Grant program to develop and improve high quality urban green spaces. Sec. 403. Tree planting grant program. Title V—Definitions Sec. 501. Definitions. I Heat Emergency 101. National ranking system for extreme heat Not later than 180 days after the date of enactment of this Act, the Director of the National Weather Service shall establish a national ranking system pilot program to evaluate and communicate to the public the severity and risk of extreme heat based on human health outcomes (mortality and morbidity). Not later than 1 year after the establishment of such program, the Director of the National Weather Service shall submit to Congress a report providing recommendations and evaluating the impact of the national ranking system for extreme heat on public preparedness and response. 102. Study on naming heat waves Not later than 180 days after the date of enactment of this Act, the Director of the National Weather Service shall submit to Congress a report containing the results of a study on the impact that naming heat waves has on public preparedness and response. 103. Grants for checking on seniors during extreme heat events (a) In general The Secretary of Health and Human Services may award grants to eligible entities to develop and implement a program under which each grant recipient— (1) operates a registry of seniors who reside in the jurisdiction of the grant recipient; (2) includes seniors in such registry only if they opt into being included