* WHAT...Life-threatening waves and currents expected. - High wave action: Waves 3 to 5 feet tonight and building to 5 to 8 feet Tuesday afternoon and evening. - Life threatening rip, longshore, and structural currents are expected. Structural currents may be especially strong on the north sides of piers or breakwalls Tuesday afternoon and evening. * WHERE...In Indiana, Northern La Porte county. In Michigan, Northern Berrien and Southern Berrien counties. * WHEN...Through Wednesday morning. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers.