(Portland, OR) -- Multnomah County Chair Jessica Vega Pederson has declared a state of emergency in response to the extreme heat. The state of emergency for the county goes into effect at ten o'clock this morning. The county has opened several cooling shelters. Those include Cook Plaza and Portland Covenant Church, which will be open from noon until 9 p.m. Additionally, Multnomah County Library is extending its hours until 8 p.m. at its Central and Gresham locations.